Afternoon,
We have an ocfs2 release 1.4 filesystem shared between two nodes (RHEL5). The filesystem in question is used exclusively for Oracle RMAN backups. A df -h shows the following: [r...@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 with the following parameters: /dev/mapper/eva_mpio_myserver07_08_oracle_bkup0 /data/orabackup ocfs2 _netdev,nointr,defaults 0 0 We have a RMAN retention policy of 3 days so backups older than that do get deleted. As a test I did a df & du of this filesystem and then deleted (via RMAN) the oldest backup, this file was 17Gb in size, after which I again did a du & df. These both reported that 17Gb had been released to the filesystem. What I still don't get is why df reports that the Used space is at 198Gb - that seems an awful waste Any insight into this major discrepancy would be much appreciated. Thanks, Nigel
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