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{{Copyright SEP AG|de}}


{{Navigation_latest|release=4.4.3|link=[[Special:MyLanguage/SEP_sesam_Documentation#previous|Dokumentations-Archiv]]}}</div><br />
{{Release-Jaglion}}
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==Übersicht==
===Overview===
<div class="boilerplate metadata" id="Additional resources" style="background-color:#ecedf1; color:#8695a7; border: 1px ridge #cdd3db; margin: 0.5em; padding: 0.5em; float: right; width: 25%; "><center><b>Weitere Ressourcen</b></center>
{{Additional_Resources_Box|seeAlsoLinks=[[Special:MyLanguage/4_4_3_Beefalo:Media_pools|Media pools]] [[Special:MyLanguage/Configuring_a_Loader|Configuring Loaders and Drives]] – [[Special:MyLanguage/Configuring_a_Data_Store|Configuring a Data Store]] – [[Special:MyLanguage/Managing_EOL|Managing EOL]] – [[Special:MyLanguage/5_0_0:Tape_Management|Tape Management]] – [[Special:MyLanguage/GFS_Backup_Retention_Strategy|GFS Backup Retention Strategy]]}}</div></noinclude>
{|style="margin: auto; margin-bottom:1em; width:100%; border:0px solid grey;"
| rowspan="2" style="padding:0px 10px 0px;" | [[File:SEP_next.png|45px|link=Media pools 4.4]]
| style="padding:0px 40px 0px 10px; color: grey; font-size: 90%; text-align:left;" | See also:
[[Special:MyLanguage/Media_pools_4.4|Medienpools]] – [[Special:MyLanguage/4_4_3:Configuring_a_Loader|Lader und Laufwerke konfigurieren]] – [[Special:MyLanguage/Configuring_a_Data_Store|Konfigurieren eines Datenspeichers]] – [[Special:MyLanguage/Managing_EOL|EOL verwalten]] – [[Special:MyLanguage/GFS_Backup_Rotation_Scheme|GFS Backup Rotationsschema]]
|}


{|style="margin: auto; margin-bottom:1em; width:100%; border:0px solid grey;"
A media pool is a group of [[Special:MyLanguage/SEP_sesam_Glossary#medium|media]] of the same type that you use for backups. How you configure a media pool depends on the type of the used storage device. With loaders, you set up a media pool to be used for backups directly to tapes. For backing up to disks (disk storage), you have to set up a [[Special:MyLanguage/SEP_sesam_Glossary#data_store|data store]] first, but still create a dedicated media pool(s) for it.  
| rowspan="2" style="padding:0px 10px 0px;" | [[File:SEP_Video.png|45px|link=https://www.youtube.com/embed/K4khlQ7D5ms?start=7801&end=7943]]
| style="padding:0px 40px 0px 10px; color: grey; font-size: 90%; text-align:left;" |
Watch SEP sesam video [https://www.youtube.com/embed/K4khlQ7D5ms?start=7801&end=7943 Konfiguration eines Medienpools für Datenspeicher].
|}


{|style="margin: auto; margin-bottom:1em; width:100%; border:0px solid grey;"
Once a media pool is configured, SEP sesam automatically [[Special:MyLanguage/SEP_sesam_Glossary#label|labels]] each medium with a unique media label during [[Special:MyLanguage/Creating_a_Media_Event#initialization|initialization]]. The media labels are stored in the SEP sesam database. The labels consist of the pool name and a 5-digit number assigned by SEP sesam within the pool.
| rowspan="2" style="padding:0px 10px 0px;" | [[File:SEP Tip.png|45px|link=Special:MyLanguage/FAQ|FAQ]]
| style="padding:0px 40px 0px 10px; color: grey; font-size: 90%; text-align:left;" | Unter [[Special:MyLanguage/FAQ|FAQ]] finden Sie Antworten auf die häufigsten Fragen.
|}


{|style="margin: auto; margin-bottom:1em; width:100%; border:0px solid grey;"
Media pools are the basis for building a [[Special:MyLanguage/Backup_Strategy_Best_Practices|backup strategy]]. Each media pool represents a set of media intended for a specific purpose. For example, media pools can be created and managed for workdays, weekends, specific locations, specific types, databases, etc. You can have different types of media pools for different types of backup data, backup sources (e.g., file backup, DB backup) or drive types.
| rowspan="2" style="padding:0px 10px 0px;" | [[File:SEP Troubleshooting.png|45px|link=Special:MyLanguage/Troubleshooting_Guide|Anleitung zur Fehlerbehebung]]
| style="padding:0px 40px 0px 10px; color: grey; font-size: 90%; text-align:left;"|Problems? Check the [[Special:MyLanguage/Troubleshooting_Guide|Anleitung zur Fehlerbehebung]].
|}</div>
Media pool is a group of [[Special:MyLanguage/SEP_sesam_Glossary#medium|media]] of the same type that you use for backups. How you configure a media pool depends on the type of the used storage device. With loaders, you set up a media pool that will be used for backing up directly to tapes. For backing up to disks (disk storage) you have to set up a [[Special:MyLanguage/SEP_sesam_Glossary#data_store|data store]] first, but still have to create a dedicated media pool for it.  


Once a media pool is configured SEP sesam automatically [[Special:MyLanguage/SEP_sesam_Glossary#label|labels]] each medium with a unique media label during [[Special:MyLanguage/Creating_a_Media_Event#initialization|initialization]]. Media labels are stored in the SEP sesam database. The labels consist of the pool name and a 5-digit number assigned by SEP sesam within the pool.  
It is possible to configure special GFS media pools for storing data on tape according to the GFS (Grandfather-Father-Son) retention strategy. For details, see [[Special:MyLanguage/GFS_Backup_Retention_Strategy|GFS Backup Retention Strategy]].


Medienpools sind die Basis für den Aufbau einer Sicherungsstrategie. Jeder Medienpool steht für eine Reihe von Medien, die für einen bestimmten Zweck vorgesehen sind. Beispielsweise können Medienpools für Arbeitstage, Wochenenden, bestimmte Orte, bestimmte Typen, Datenbanken usw. angelegt und verwaltet werden. Sie können verschiedene Arten von Medienpools für verschiedene Arten von Sicherungsdaten, Sicherungsquellen (z.B. Datei-Backup, DB-Backup) oder Laufwerkstypen festlegen.
Note that the ''Options'' tab for configuring a special set of options to allow sharing of media across media pools is only available when configuring media pools for tape media, as described in the following section.


It is possible to configure special GFS media pools for storing a data to tape according to the GFS (Grandfather-Father-Son) rotation scheme. For details, see [[Special:MyLanguage/GFS_Backup_Rotation_Scheme|GFS Backup Rotation Scheme]].
==={{anchor|loader}}Configuring media pools for tape media===


=={{anchor|loader}}Medienpools für Lader konfigurieren==
After you configure your backup hardware and create a new drive group, you have to create a new media pool and assign it to the drive group that contains your newly created drives. With loaders, you can configure a media pool that will be used for backing up directly to tapes. How you set up your backup strategy depends on the data that is being backed up. Typically, you would create at least three media pools. For details on setting up loaders and drives, see [[Special:MyLanguage/Configuring_a_Loader|Configuring Loaders and Drives]].


Nachdem Sie Ihre Sicherungs-Hardware konfiguriert und eine neue Laufwerksgruppe erstellt haben, müssen Sie einen neuen Medienpool erstellen und diese der Laufwerksgruppe zuordnen, die Ihre neu erstellten Laufwerke enthält. Mit Ladern können Sie einen Medienpool konfigurieren, der für die direkte Sicherung auf Bänder verwendet wird. Welche Sicherungsstrategie Sie einrichten hängt von den zu sichernden Daten ab. In der Regel werden Sie mindestens drei Medienpools anlegen. Einzelheiten zur Einrichtung von Ladern und Laufwerken finden Sie unter [[Special:MyLanguage/4_4_3:Configuring_a_Loader|Lader und Laufwerke konfigurieren]].
===={{anchor|steps_loader}}Steps====  
 
==={{anchor|steps_loader}}Schritte ===


<ol><li>From ''Main Selection'' -> '''Media Pools''', click '''New Media Pool'''. The ''New Media Pool'' window appears.</li>
<ol><li>From ''Main Selection'' -> '''Media Pools''', click '''New Media Pool'''. The ''New Media Pool'' window appears.</li>
<li>{{anchor|media_pool}}In the ''Media Pool'' window, specify the required fields:</li>
<li>{{anchor|media_pool}}In the ''Media Pool'' window, specify the required fields:</li>


[[Image:Media_pool_tape.png|link=]]
[[Image:Media_pool_tape_Beefalo_V2.jpg|450px|link=]]
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<ul><li>'''Name''': Specify a name of a media pool, for example, ''MP_tape_day'' (for daily backups), ''MP_tape_week'' (for weekly backups), etc.</li>
<ul><li>'''''Name''''': Enter the name of a media pool, for example, ''MP_tape_day'' (for daily backups), ''MP_tape_week'' (for weekly backups), etc.</li>
<li>'''Description''': Optionally, insert the description of the pool.</li>
<li>'''''Description''''': Optionally, add the description of the pool.</li>
<li>'''Drive Group''':  From the drop-down list of all available drive groups, select the relevant drive group to which a media pool will be attached (e.g, Tape_Drives, RDS_LTO_Dives, etc.). For details on drive groups, see [[Special:MyLanguage/Drives_4.4#drive_group|Drives]].  </li>
<li>'''''Drive group''''':  From the drop-down list of all available drive groups, select the relevant drive group to which a media pool will be attached (e.g, Tape_Drives, RDS_LTO_Dives, etc.). For details on the drive groups, see [[Special:MyLanguage/4_4_3_Beefalo:Drives#drive_group|Drives]].  </li>
<li>'''Retention time [Days]''': Specify the retention time for media pool. The retention time period starts with the date a save set is written to the media and lasts for the period defined by media pool's EOL (in days). When a save set is stored on tape, every stored save set has its own saveset EOL, however, the expiration date of the tape corresponds to the maximum retention time (the longest EOL) identified on it. For details, see [[Special:MyLanguage/Managing_EOL#tape|tape media EOL]].</li></ul>
<li>'''''Retention time [days]''''': Specify the retention time for the media pool. The retention time starts with the date a saveset is written to the media and lasts for the period defined by the media pool retention time (in days). The expiry date of the retention time is the EOL of the saveset. When a saveset is stored on a tape, every stored saveset has its own ''saveset EOL''. However, the expiry date of the tape corresponds to the maximum retention time (the longest EOL) identified on it. For details, see [[Special:MyLanguage/Automatic_Retention_(EOL)_Management#EOL|tape media EOL]].</li>
<li>Readability check is used to check the readability of data on tape and its structure, and to ensure that the backup sets on tape are recorded in the database and vice versa. Use the following options to specify the readability check settings:</li>
<li>'''''Set media pool inactive''''': You can deactivate a media pool so that it is no longer available.</li>
</ul>
<li>The readability check allows you to check the readability of the data on the tape and its structure and to ensure that the backup sets on the tape are recorded in the database and vice versa. Click the ''Readability Check'' tab and use the following options to specify the settings:</li>


[[Image:Media_pool_readability.png|link=]]
[[Image:Media_pool_readability_Beefalo_V2.jpg|450px|link=]]
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<ul><li>'''Readability check limit [days]''': By default, the value is 0 (zero) and the readability check is switched off. If you set a number > 0 , a medium is checked after the specified number of days and marked by status ''Red check required''. Note that readability check can only be applied if a medium EOL has not expired and is not applicable for EOL-free media. For details, see [[Special:MyLanguage/Managing_EOL|Managing EOL]].  </li>  
<ul><li>'''''Readability check limit [days]''''': Specify how often (in days) the readability check will be performed. For example, setting it to 90 means that the check will be performed every 90 days, and setting it to 1 will activate a daily check. By default, the value is set to 0 (zero), which means that the readability check is turned off. Note that the readability check can only be applied if the ''media EOL'' has not yet expired. It is not applicable to EOL-free media. For details, see [[Special:MyLanguage/Configuring_a_Readability_Check|Configuring a Readability Check]].  </li>  
<li>'''Readability check limit [days]''': Specify the number of days when a readability test will be overdue. This calculation is based on the ''readability check limit [days]'' and the ''value of expiration overdue''.  </li>
<li>'''''Expiration of read check overdue [days]''''': Specify the number of days after which a readability check is considered overdue. This setting adds an additional period before the medium is flagged as ''Readability check overdue''. For example, if ''Readability check limit'' is set to 90 and ''Expiration of read check overdue'' is set to 5, the medium is flagged as ''Readability check overdue'' after 95 days.  </li>
<li>'''Repeat rate for readability check [times]''': If you select ''Unlimited'', the medium is checked according to the specified frequency. If you define ''Execute'', the check is repeated as many times as specified.</li></ul>
<li>'''''Repeat rate for readability check [times]''''': This option determines how many times the readability check will be performed. If you select ''Unlimited'', the check will be performed with the set frequency and there will be no limit to the number of repetitions. If you select ''Execute'' and set the number of repetitions, the check will be repeated with the set frequency as many times as specified. For example, if you set the ''Readability check limit'' option to 90 days, and the ''Repeat rate for readability check [times]'' option to 3, the readability check will be performed every 90 days, for a total of 3 repetitions.</li></ul>
{{note|To perform the readability check, you have to set up a schedule and link a media event to it. When creating a media event you have to select ''readability check'' option and a ''media pool'' for your event. For details, see [[Special:MyLanguage/Creating_a_Media_Event|Creating a Media Event]].}}
{{note|To perform the readability check, you have to set up a schedule and link a media event to it. When creating a media event, you have to select the ''readability check'' option and a ''media pool'' for your event. For details, see [[Special:MyLanguage/Configuring_a_Readability_Check|Configuring a Readability Check]].}}
<li>In the ''Options'' window, you can configure a special set of options (according to your strategy) to allow sharing of media across media pools. The following media management options may be useful if media from the respective pool are not available for backup. In this case a system requires new media.</li>
<li>Click '''OK'''.</li></ol>
 
====={{anchor|options}}Tab ''Options''=====
Once you have created a media pool, you can set additional options. The '''Options''' tab is available in the media pool properties (''Main Selection'' -> ''Media Pools'' -> double-click a media pool) and allows you to set up a media strategy and configure the sharing of media between media pools. This is useful when media from the target pool are not available for backup and another set of media can be used.
<ul><li>'''''May use empty, foreign media''''': SEP sesam will use unknown or blank tapes for the backup if no tapes are available in the respective pool.</li>
<li>'''''May use EOL free media''''': SEP sesam may use [[Special:MyLanguage/SEP_sesam_Glossary#EOL|EOL]]-free media other than the requested one in a single tape drive (without loader).</li>
<li>'''''May use SPARE media''''': You have to configure a <tt>'''SPARE_'''</tt> media pool ([[Special:MyLanguage/Configuring_a_Media_Pool#spare_pool|see the following section]]) and then you can enable the ''SPARE media'' option. This way, SEP sesam automatically uses the media from the SPARE pool if no tapes are available in the target media pool. For details, see [[Special:MyLanguage/4_4_3_Beefalo:Media_Strategy#spare_pools|Spare Pools]].</li>
<li>'''''May use media from another pool''''': SEP sesam used available tapes from other media pools if no tapes are available in the target media pool.</li>
<li>'''''Another media pool may use media from this pool''''': A media pool that runs out of its own tapes can use the available tapes from this media pool.</li>
<li>'''''Close current backup tape during initialization of new one''''': When you change to a new tape in this pool, the tape that is currently in use in this pool will be closed before a new one is initialized. With this option, the tape will get closed before it is offloaded from the tape drive, so that no more data can be appended to this tape. </li></ul>
 
If the data on the tapes is no longer needed, the metadata on the tape media in the media pools can be removed:
<ul><li>'''''Delete all metadata from tape media when the tape becomes EOL free''''': Data on tapes can only be deleted when their EOL has expired. If you activate this option, the metadata of tapes that are no longer write-protected will be deleted. </li>
<li>'''''Delete all metadata and re-initialize tape''''': If you activate this option, all metadata of the tape media is deleted and the tape is initialized (provided the tape is available to SEP sesam) by loading the tape into a drive and physically erasing it, thus removing access to all existing data on the tape.</li></ul>
 
[[Image:media_pool-options.jpg|450px|link=]]
<br />
 
For more details on tape-related operations, see [[Special:Mylanguage/Tape_Management|Tape Management]].


[[Image:Media_pool_options.png|link=]]
===={{anchor|spare_pool}}Configuring spare pools====
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<ul><li>'''may use empty, foreign media''': If you select this option, SEP sesam will use unknown or blank tapes for backup when no tapes are available in the respective pool.</li>
<li>'''may use EOL free media''': If you select this option, you can use the tapes with expired [[Special:MyLanguage/SEP_sesam_Glossary#EOL|EOL]] from the same media pool for backup.</li>
<li>'''may use SPARE media''': This option can be used if you have configured media pool <tt>'''SPARE_''' before</tt> ([[Special:MyLanguage/Configuring_a_Media_Pool#spare_pool|see below section]]). By enabling the ''SPARE media'' option, SEP sesam automatically uses the media from the SPARE pool if there are no available tapes in the target media pool. For details, see [[Special:MyLanguage/Media_Strategy_4.4#spare_pools|Spare Pools]].</li>
<li>'''may use media from another pool''': This option enables SEP sesam to use available tapes of other media pools if there are no available tapes in the target media pool.</li>
<li>'''another media pool may use media from this pool''': If you select this option, you enable another media pool that runs out of its own tapes to use the available tapes from the respective media pool.</li></ul>
<li>Click '''OK'''.</li></ol>


==={{anchor|spare_pool}}Configuring spare pools===
You configure a spare pool in the same way as any other media pool, except for the name of the pool - <tt>'''SPARE_'''</tt>. The name of the spare pool must follow the rule to use <tt>'''SPARE_'''</tt> as the naming convention. This way, SEP sesam is able to identify this pool as a spare pool.<br />


You configure a spare pool in the same way as you any other media pool except for the name of the pool - <tt>'''SPARE_'''</tt>. The name of the spare pool must follow the rule to use <tt>'''SPARE_'''</tt> as the naming convention. This way, SEP sesam is able to identify this pool as a spare pool.<br />
Once your spare media pool is created, open its properties: ''Main Selection'' -> ''Media Pools'' -> double-click the spare media pool you created, switch to the '''Options''' tab and check the option '''''Another media pool may use media from this pool'''''. This means that any media pool that runs out of its own tapes can use the available tapes from this media pool.


[[Image:Media_pool_spare_pool.png|link=]]
[[Image:media_pool-spare.jpg|450px|link=]]
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=={{anchor|data_store}}Configuring media pools for data stores==
==={{anchor|data_store}}Configuring media pools for data stores===  


With data stores, you configure media pools to be used for backing up to disks (disk storage). First you have to configure a data store, and then you create a dedicated media pool for it. For details on how to configure a data store, see [[Special:MyLanguage/Configuring_a_Data_Store|Configuring a Data Store]].  
With data stores, you configure media pools that are used for backing up to disks (disk storage). You must first configure a data store and then create a dedicated media pool for it. For details on how to configure a data store, see [[Special:MyLanguage/Configuring_a_Data_Store|Configuring a Data Store]].  


==={{anchor|steps_data}}Steps===
===={{anchor|steps_data}}Steps====  


<ol><li>When you configure your data store, you are prompted to configure a media pool immediately. You can also configure a media pool later from ''Main Selection'' -> '''Media Pools''', click '''New Media Pool'''. ''New Media Pool'' window appears.</li>
<ol><li>When you configure your data store, you are prompted to configure a media pool immediately. You can also configure a media pool later from the ''data store properties'' -> click '''Create Media Pool''', or from ''Main Selection'' -> '''Media Pools''', click '''New Media Pool'''. The ''New Media Pool'' window is displayed.</li>


[[Image:Media_pool_data_store.png|link=]]
[[Image:Media_pool_data_store_Beefalo_V2.jpg|450px|link=]]
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<li>As described [[Special:MyLanguage/Configuring_a_Media_Pool#media_pool|above]], enter a '''media pool name''', select a '''drive group''' and set up the '''Retention time'''. Media pool retention time is specified in days and defines how long the backed up data on media remains protected after the data is written to the medium. The retention time period starts with the date a save set is written to the medium and lasts for the period defined by media pool's EOL. When the protection expires, SEP sesam can re-use the media for backups again. For details, see [[Special:MyLanguage/Managing_EOL#media_pool|Media pool EOL]]. </li>  
<li>'''''Name''''': Enter the name of a media pool, e.g. ''DS_day'' (for daily backups), ''DS_week'' (for weekly backups), etc.</li>
<li>'''''Description''''': Optionally, add the description of the pool.</li>
<li>'''''Drive group''''':  From the drop-down list of all available drive groups, select the relevant drive group to which a media pool will be attached (e.g, dg_datastore01). For details on the drive groups, see [[Special:MyLanguage/4_4_3_Beefalo:Drives#drive_group|Drives]].  </li>
<li>'''''Retention time [days]''''': Specify the retention time for the media pool. The retention time for the media pool is specified in days and defines how long the data on the media remains protected. The retention time starts on the date a saveset is written to the media and lasts for the period defined by the media pool retention time (in days). The expiry date of the retention time is the EOL of the saveset. After the protection expires, the saveset is deleted while purge is running on the data store and the memory space is released. For details, see [[Special:MyLanguage/Automatic_Retention_(EOL)_Management#EOL|EOL (retention) types]].</li>
<li>Click '''OK'''.</li></ol>
<li>Click '''OK'''.</li></ol>


You can check which media pools are configured with a data store in the data store properties: from ''Main Selection'' -> '''Data Stores''' -> double-click the selected data store -> select the '''Areas''' tab. By clicking the media pool in the list, its properties are displayed.<br />
== Monitoring data stores and configured media pools ==
You can check which media pools are configured with a data store in the GUI or via [[Special:MyLanguage/5_0_0:SEP_sesam_Web_UI#data_store|SEP sesam Web UI]].
 
===== Data store properties in the Web UI =====
 
You can access the ''Web UI'' in one of the following ways:
*via the GUI: by clicking the ''Dashboard'' icon in the toolbar or via the menu bar -> ''Activities'' -> ''Dashboard'' or via ''Main Selection'' -> ''Monitoring'' -> ''Dashboard''
*by entering the following address in the browser bar:
'''''http://[sesamserver]:11401/sep/ui'''''<br />
or<br />
'''''https://[sesamserver]:11401/sep/ui'''''.
 
<ol><li>In the left menu, select ''Data stores'' and then click the name of the data store to display its properties.</li>
<li>Click the tab ''Media Pools, Media, Drives'' to check the configured media pools/media.</li>
[[Image:DS_media_pools-media-drives.jpg|750px|link=]]
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<li>Use the ''Dependencies'' tab to view the diagram of all dependencies of the datastore and ''Drives - RDS'' (first tab) or the datastore and ''Media Pools - Drive Groups - Drives - RDS'' (second tab). Hovering the cursor over the diagram shows a tooltip with details for each object.</li>
 
[[Image:DS_dependencies-media_pool.jpg|750px|link=]]
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===== Data store properties in the GUI =====


[[Image:Data_store_areas.png|link=]]
Open the data store properties: from ''Main Selection'' -> '''Data Stores''' -> double-click the selected data store -> select the '''Media''' tab. Click the media pool in the list to display its properties.
<br clear=all


[[Image:DS_properties_media_tab.jpg|750px|link=]]
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<div class="noprint">
<noinclude><div class="noprint">==See also==
[[Special:MyLanguage/4_4_3_Beefalo:Media_pools|Media pools]] – [[Special:MyLanguage/Configuring_a_Loader|Configuring Loaders and Drives]] – [[Special:MyLanguage/Configuring_a_Data_Store|Configuring a Data Store]] – [[Special:MyLanguage/Managing_EOL|Managing EOL]] – [[Special:MyLanguage/5_0_0:Tape_Management|Tape Management]] – [[Special:MyLanguage/GFS_Backup_Retention_Strategy|GFS Backup Retention Strategy]]


==See also==
{{Copyright}}</div></noinclude>
[[Special:MyLanguage/Media_pools_4.4|Media pools]] – [[Special:MyLanguage/4_4_3:Configuring_a_Loader|Configuring Loaders and Drives]] – [[Special:MyLanguage/Configuring_a_Data_Store|Configuring a Data Store]] – [[Special:MyLanguage/Managing_EOL|Managing EOL]] – [[Special:MyLanguage/GFS_Backup_Rotation_Scheme|GFS Backup Rotation Scheme]]</diV>

Latest revision as of 08:56, 2 October 2023


Other languages:
Icon archived docs.png This is documentation for SEP sesam version 5.0.0 Jaglion.
This is not the latest version of SEP sesam documentation and, as such, does not provide information on features introduced in the latest release. For more information on SEP sesam releases, see SEP sesam Release Versions. For the latest documentation, check SEP sesam documentation.


Overview

A media pool is a group of media of the same type that you use for backups. How you configure a media pool depends on the type of the used storage device. With loaders, you set up a media pool to be used for backups directly to tapes. For backing up to disks (disk storage), you have to set up a data store first, but still create a dedicated media pool(s) for it.

Once a media pool is configured, SEP sesam automatically labels each medium with a unique media label during initialization. The media labels are stored in the SEP sesam database. The labels consist of the pool name and a 5-digit number assigned by SEP sesam within the pool.

Media pools are the basis for building a backup strategy. Each media pool represents a set of media intended for a specific purpose. For example, media pools can be created and managed for workdays, weekends, specific locations, specific types, databases, etc. You can have different types of media pools for different types of backup data, backup sources (e.g., file backup, DB backup) or drive types.

It is possible to configure special GFS media pools for storing data on tape according to the GFS (Grandfather-Father-Son) retention strategy. For details, see GFS Backup Retention Strategy.

Note that the Options tab for configuring a special set of options to allow sharing of media across media pools is only available when configuring media pools for tape media, as described in the following section.

Configuring media pools for tape media

After you configure your backup hardware and create a new drive group, you have to create a new media pool and assign it to the drive group that contains your newly created drives. With loaders, you can configure a media pool that will be used for backing up directly to tapes. How you set up your backup strategy depends on the data that is being backed up. Typically, you would create at least three media pools. For details on setting up loaders and drives, see Configuring Loaders and Drives.

Steps

  1. From Main Selection -> Media Pools, click New Media Pool. The New Media Pool window appears.
  2. In the Media Pool window, specify the required fields:
  3. Media pool tape Beefalo V2.jpg
    • Name: Enter the name of a media pool, for example, MP_tape_day (for daily backups), MP_tape_week (for weekly backups), etc.
    • Description: Optionally, add the description of the pool.
    • Drive group: From the drop-down list of all available drive groups, select the relevant drive group to which a media pool will be attached (e.g, Tape_Drives, RDS_LTO_Dives, etc.). For details on the drive groups, see Drives.
    • Retention time [days]: Specify the retention time for the media pool. The retention time starts with the date a saveset is written to the media and lasts for the period defined by the media pool retention time (in days). The expiry date of the retention time is the EOL of the saveset. When a saveset is stored on a tape, every stored saveset has its own saveset EOL. However, the expiry date of the tape corresponds to the maximum retention time (the longest EOL) identified on it. For details, see tape media EOL.
    • Set media pool inactive: You can deactivate a media pool so that it is no longer available.
  4. The readability check allows you to check the readability of the data on the tape and its structure and to ensure that the backup sets on the tape are recorded in the database and vice versa. Click the Readability Check tab and use the following options to specify the settings:
  5. Media pool readability Beefalo V2.jpg
    • Readability check limit [days]: Specify how often (in days) the readability check will be performed. For example, setting it to 90 means that the check will be performed every 90 days, and setting it to 1 will activate a daily check. By default, the value is set to 0 (zero), which means that the readability check is turned off. Note that the readability check can only be applied if the media EOL has not yet expired. It is not applicable to EOL-free media. For details, see Configuring a Readability Check.
    • Expiration of read check overdue [days]: Specify the number of days after which a readability check is considered overdue. This setting adds an additional period before the medium is flagged as Readability check overdue. For example, if Readability check limit is set to 90 and Expiration of read check overdue is set to 5, the medium is flagged as Readability check overdue after 95 days.
    • Repeat rate for readability check [times]: This option determines how many times the readability check will be performed. If you select Unlimited, the check will be performed with the set frequency and there will be no limit to the number of repetitions. If you select Execute and set the number of repetitions, the check will be repeated with the set frequency as many times as specified. For example, if you set the Readability check limit option to 90 days, and the Repeat rate for readability check [times] option to 3, the readability check will be performed every 90 days, for a total of 3 repetitions.
    Information sign.png Note
    To perform the readability check, you have to set up a schedule and link a media event to it. When creating a media event, you have to select the readability check option and a media pool for your event. For details, see Configuring a Readability Check.
  6. Click OK.
Tab Options

Once you have created a media pool, you can set additional options. The Options tab is available in the media pool properties (Main Selection -> Media Pools -> double-click a media pool) and allows you to set up a media strategy and configure the sharing of media between media pools. This is useful when media from the target pool are not available for backup and another set of media can be used.

  • May use empty, foreign media: SEP sesam will use unknown or blank tapes for the backup if no tapes are available in the respective pool.
  • May use EOL free media: SEP sesam may use EOL-free media other than the requested one in a single tape drive (without loader).
  • May use SPARE media: You have to configure a SPARE_ media pool (see the following section) and then you can enable the SPARE media option. This way, SEP sesam automatically uses the media from the SPARE pool if no tapes are available in the target media pool. For details, see Spare Pools.
  • May use media from another pool: SEP sesam used available tapes from other media pools if no tapes are available in the target media pool.
  • Another media pool may use media from this pool: A media pool that runs out of its own tapes can use the available tapes from this media pool.
  • Close current backup tape during initialization of new one: When you change to a new tape in this pool, the tape that is currently in use in this pool will be closed before a new one is initialized. With this option, the tape will get closed before it is offloaded from the tape drive, so that no more data can be appended to this tape.

If the data on the tapes is no longer needed, the metadata on the tape media in the media pools can be removed:

  • Delete all metadata from tape media when the tape becomes EOL free: Data on tapes can only be deleted when their EOL has expired. If you activate this option, the metadata of tapes that are no longer write-protected will be deleted.
  • Delete all metadata and re-initialize tape: If you activate this option, all metadata of the tape media is deleted and the tape is initialized (provided the tape is available to SEP sesam) by loading the tape into a drive and physically erasing it, thus removing access to all existing data on the tape.

Media pool-options.jpg

For more details on tape-related operations, see Tape Management.

Configuring spare pools

You configure a spare pool in the same way as any other media pool, except for the name of the pool - SPARE_. The name of the spare pool must follow the rule to use SPARE_ as the naming convention. This way, SEP sesam is able to identify this pool as a spare pool.

Once your spare media pool is created, open its properties: Main Selection -> Media Pools -> double-click the spare media pool you created, switch to the Options tab and check the option Another media pool may use media from this pool. This means that any media pool that runs out of its own tapes can use the available tapes from this media pool.

Media pool-spare.jpg

Configuring media pools for data stores

With data stores, you configure media pools that are used for backing up to disks (disk storage). You must first configure a data store and then create a dedicated media pool for it. For details on how to configure a data store, see Configuring a Data Store.

Steps

  1. When you configure your data store, you are prompted to configure a media pool immediately. You can also configure a media pool later from the data store properties -> click Create Media Pool, or from Main Selection -> Media Pools, click New Media Pool. The New Media Pool window is displayed.
  2. Media pool data store Beefalo V2.jpg
  3. Name: Enter the name of a media pool, e.g. DS_day (for daily backups), DS_week (for weekly backups), etc.
  4. Description: Optionally, add the description of the pool.
  5. Drive group: From the drop-down list of all available drive groups, select the relevant drive group to which a media pool will be attached (e.g, dg_datastore01). For details on the drive groups, see Drives.
  6. Retention time [days]: Specify the retention time for the media pool. The retention time for the media pool is specified in days and defines how long the data on the media remains protected. The retention time starts on the date a saveset is written to the media and lasts for the period defined by the media pool retention time (in days). The expiry date of the retention time is the EOL of the saveset. After the protection expires, the saveset is deleted while purge is running on the data store and the memory space is released. For details, see EOL (retention) types.
  7. Click OK.

Monitoring data stores and configured media pools

You can check which media pools are configured with a data store in the GUI or via SEP sesam Web UI.

Data store properties in the Web UI

You can access the Web UI in one of the following ways:

  • via the GUI: by clicking the Dashboard icon in the toolbar or via the menu bar -> Activities -> Dashboard or via Main Selection -> Monitoring -> Dashboard
  • by entering the following address in the browser bar:

http://[sesamserver]:11401/sep/ui
or
https://[sesamserver]:11401/sep/ui.

  1. In the left menu, select Data stores and then click the name of the data store to display its properties.
  2. Click the tab Media Pools, Media, Drives to check the configured media pools/media.
  3. DS media pools-media-drives.jpg
  4. Use the Dependencies tab to view the diagram of all dependencies of the datastore and Drives - RDS (first tab) or the datastore and Media Pools - Drive Groups - Drives - RDS (second tab). Hovering the cursor over the diagram shows a tooltip with details for each object.
  5. DS dependencies-media pool.jpg
Data store properties in the GUI

Open the data store properties: from Main Selection -> Data Stores -> double-click the selected data store -> select the Media tab. Click the media pool in the list to display its properties.

DS properties media tab.jpg

==See also==

Media poolsConfiguring Loaders and DrivesConfiguring a Data StoreManaging EOLTape ManagementGFS Backup Retention Strategy

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