Starting 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, preparation steps, and for preliminary transfer of HOME data. 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.
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.
Two-month 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 |
|---|---|---|
1 | September 30 | one-week downtime of the GPU clusters (A100 and PVC), |
2 | end of October | one-day maintenance for all compute systems |
3 | end 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 3 of the schedule, data migration for WORK will be organized as follows.
Active migration phase:
a two-month period starting in October
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)
Post migration phase:
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.
WORK is a file system shared by all users. It is important that only data actively used in computations (“hot” data) reside here. WORK is not intended to store backups, software installations, and other kinds of “cold” data.
The PERM file system is not affected by this maintenance. During all times of Lise operation, PERM will be available to each user.