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2009 May 07
1
df & du - that old chestnut
...system in question is used exclusively for Oracle RMAN
backups.
A df -h shows the following:
[root at imsthdb07 ~]# df -h /data/orabackup
Filesystem Size Used Avail
Use% Mounted on
/dev/mapper/eva_mpio_myserver07_08_oracle_bkup0 250G 198G
53G 79% /data/orabackup
While a du -sh shows that 62G is used
I read Sunil Mushran's article on the reported differences between df &
du and that sort of makes sense (maybe I'm missing something). The
filesystem was created with a Blocksize and Clustersize of 4Kb and is
mounted...
2007 Feb 27
16
understanding zfs/thunoer "bottlenecks"?
Currently I''m trying to figure out the best zfs layout for a thumper wrt. to read AND write performance.
I did some simple mkfile 512G tests and found out, that per average ~ 500 MB/s seems to be the maximum on can reach (tried initial default setup, all 46 HDDs as R0, etc.).
According to http://www.amd.com/us-en/assets/content_type/DownloadableAssets/ArchitectureWP_062806.pdf I would