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--- cluster:149 [2016/08/30 14:33] – [Supermicro] hmeij07
+++ cluster:149 [2016/12/06 20:13] (current) – [Supermicro] hmeij07
@@ Line 6: / Line 6: @@
-==== The problem ====
+==== The Storage Problem ====
 In a commodity HPC setup deploying plain NFS, bottle necks can develop.  Then the compute nodes hang and a cold reboot of the entire HPCC is needed. NFS clients on a compute node may contact NFS daemons on our file server sharptail and ask for say a file. The NFS daemon assigned the task then locates the content via metadata (location, inodes, access, etc) on the local disk array.  The NFS daemon  collects the content and hands it off to the NFS client on compute node. So the data passes thru the entire NFS layer.
@@ Line 98: / Line 98: @@
 Elegant, simple, and you can start smaller and scale up. We have room for 2 on the QDR Mellanox switch (and 2 up to 5 on the DDR Voltaire switch). Buying another QDR Mellanox adds $7K for an 18 port switch. IPoIB would be desired if we stay with Supermicro.
-What's even more desired is to start our own parallel file system with [[BeeGFS|www.beegfs.com/]]
+What's even more desired is to start our own parallel file system with  [[http://www.beegfs.com/|BeeGFS]]
+**Short term plan**
+  * Grab the 32x2T flexstorage hard drives and insert into cottontail's empty disk array
+      * Makes for a 60T raw raid 6 storage place (2 hot spares)
+      * move the sharptail /snapshots to it (remove that traffic from file server)
+  * Dedicate greentail's disk array to /sanscratch
+      * Remove /home_backup 10T
+      * Extend /sanscratch form 27T to 37T
+  * Dedicate sharptail's disk array to /home
+      * Keep old 5T /sanscratch as backup, idle
+      * Remove 15T /snapshots
+      * Extend /home for 10T to 25T
+      * Keep 7T /archives until those users graduate, move to Rstore
+**Long term plan**
+  * Start a BeeGFS storage cluster
+      * cottontail as MS (management server)
+      * sharptail as AdMon (monitor server) and proof of concept storage OSS
+          * pilot storage on  idle /sanscratch/beegfs/
+          * also a folder on cottonttail:/snapshots/beegfs/
+      * n38-n45 (8) as MDS (metadata servers, 15K local disk, no raid)
+      * Buy 2x 2U Supermicro for OSS (object storage servers for a total of 80T usable, raid 6, $12.5K)
+      * Serve up BeeGFS file system using IPoIB
+      * Move /home to it
+      * Backup to older disk arrays
+      * Expand as necessary
 ===== Loose Ends =====
@@ Line 106: / Line 133: @@
   * backup Openlava scheduler for cottontail.wesleyan.edu
   * backup replacement for greentail.wesleyan.edu (in case it fails)
+Bought.
+ --- //[[hmeij@wesleyan.edu|Henk]] 2016/10/27 14:49//
 Warewulf golden image it as if it is greentail.