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| abstract:caviness:filesystems:lustre [2020-03-06 09:42] – [A Storage Node] anita | abstract:caviness:filesystems:lustre [2020-03-06 09:43] – [The Lustre Filesystem] anita |
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| * File system capacity is not limited by hard disk size | * File system capacity is not limited by hard disk size |
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| The capacity of a Lustre filesystem is the sum of its constituent OSTs, so a Lustre filesystem's capacity can be grown by the addition of OSTs (and possibly OSSs to serve them). For example, should the 172 TB Lustre filesystem on Mills begin to approach its capacity, additional capacity could be added with zero downtime by buying and installing another OSS pair. | The capacity of a Lustre filesystem is the sum of its constituent OSTs, so a Lustre filesystem's capacity can be grown by the addition of OSTs (and possibly OSSs to serve them). For example, should the 172 TB Lustre filesystem begins to reach its capacity, additional capacity could be added with zero downtime by buying and installing another OSS pair. |
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| <note important>Creating extremely large filesystems has one drawback: traversing the filesystem takes so much time that it becomes impossible to create off-site backups for further data resilience. For this reason Lustre filesystems are most often treated as volatile/scratch storage.</note> | <note important>Creating extremely large filesystems has one drawback: traversing the filesystem takes so much time that it becomes impossible to create off-site backups for further data resilience. For this reason Lustre filesystems are most often treated as volatile/scratch storage.</note> |