| Inhalt | ||
|---|---|---|
|
Starting from August 2024, NHR@ZIB will replace the the underlying hardware of Lise’s global file systems HOME and WORK for all compute systems of Lise in Berlinwill be replaced. This affects all login nodes and all Compute compute partitions. Please be aware of the following activities.
...
oneOne-week maintenance - The replacement of the file systems HOME and WORK is prepared.twofor preparation steps and for 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.
Two-month migration phase - Users can copy data from the old to the new WORK file system.
All data in the HOME file system will be copied by NHR@ZIB staff. Users do not have to do anything on the HOME file system.
Time schedule
for data in WORK. During this period, both the old and new WORK file systems are available, and users transfer their data from the old to the new WORK storage.
Schedule
The following steps will be executed consecutively.
step | estimated date | subject |
|---|---|---|
1 | mid middle of August | email update for the migration plan |
2 | end of August | one-week maintenance |
3 | September | three weeks usual of normal operation without changes |
4 | Sept-Nov | two months migration phase , for users to copy their data from the old to the new WORK storage |
Migration phase for WORK
As In step number 4 in section Time of the schedule, data migration for the WORK file system follows these steps.
Migration phase
...
WORK will be organized as follows.
Active migration phase:
a two months period starting in September
...
...
simultaneous user access to
...
the old and
...
new WORK file
...
systems
data transfer by users from the old to the new WORK
...
NHR@ZIB staff will not copy any data to the new WORK file system.
After the end of the migration phase
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 are 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 operation of
...
Lise, PERM will be available
...
to each user.