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Starting August September 2024, the underlying hardware of Lise’s global file systems HOME and WORK will be replaced. This affects all login nodes and all compute partitions. Please be aware of the following activities.
One-week downtime for maintenance for , preparation steps, and for preliminary transfer of HOME data. During this downtime, NHR@ZIB staff copies all data from the old to the new HOME storage. User’s don’t need to take action regarding their data in HOME. No user action is required.
One-day maintenance of the entire system for a final synchronization step between old and new HOME. Old HOME goes offline, new HOME goes online. No user action is required.
Two-month migration Migration phase for data in WORK. During this period, both the old and new WORK file systems are available. Users transfer their data from the old to the new WORK storage.
Schedule
The following steps will be executed consecutively.
step | estimated start date | subject | |||
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1 | middle of August | email update for the migration plan | September 30 | one-week downtime of the GPU clusters (A100 and PVC), | |
2 | end of AugustOctober | one-week day maintenance for all compute systems | |||
3 | September | three weeks of normal operation without changes | 4 | Sept-Novend of October | two-month migration phase for users to copy their data from the old to the new WORK storage |
Migration phase for WORK
In step 4 3 of the schedule, data migration for WORK will be organized as follows.
Active migration phase:
a two months -month period starting in SeptemberOctober
simultaneous user access to the old and new WORK file systems
data transfer by users from the old to the new WORK storage (no data transfer by NHR@ZIB staff)
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only the new WORK file system is available
the old WORK file system is switched off, its data is deleted
Remarks
WORK is a scratch file system - that means, no backups are available! Data can get lost any time, due to user mistakes or due to system failures. Users need to copy important data (job results) to a safe place.
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