Differences

This shows you the differences between two versions of the page.

--- doku:vsc4_storage [2023/10/23 10:41] – [Usage ''$HOME''] goldenberg
+++ doku:vsc4_storage [2023/10/23 10:58] (current) – [VSC Storage] goldenberg
@@ Line 1: / Line 1: @@
 ===== VSC Storage =====
-VSC-4 and VSC-4 provide two unified facilities for data: the high-performance IBM Storage Scale Parallel Filesystem and a node-local flash storage. The parallel filesystem is the same on both clusters, so projects that exist on both clusters can access the same data.
+VSC-4 and VSC-5 provide two unified facilities for data: the high-performance IBM Storage Scale Parallel Filesystem and a node-local flash storage. The parallel filesystem is the same on both clusters, so projects that exist on both clusters can access the same data.
-The They are accessible under:
+They are accessible under:
   * **IBM Spectrum Scale**:
@@ Line 17: / Line 17: @@
 ==== Usage ''$DATA'' ====
-''$DATA'' is a tiered file system containing 500TB flash and around 1PB of HDD storage.
+''$DATA'' is a tiered file system containing 500TB flash and around 5PB of HDD storage.
-Quota on ''$DATA'' is 10TB and 10^6 number of files and can be extended up to 100TB. If even more
+Quota on ''$DATA'' is 10TB and 10^6 number of files and can be extended up to 100TB. If even more size is needed, specific arrangements can be made.
+==== Usage '/local' ====
+/local is a locally mounted NVMe disk. The size is about 450GB on VSC-4 and 1.8TB on VSC-5. Data retention is not guaranteed, al data is lost on a reboot, so they need to be transferred after use.
 ==== Backup Policy ====
-Backup of user files independent of location is solely the responsibility of each user.
+We operate a backup for disaster recovery on two physical sites with IBM Jaguar tape libraries. In the case of $DATA, this backup can be toggled off and on in the project management page. Restore of lost or deleted files is not possible. Backup of user files is solely the responsibility of each user.