Here is the test script:
Attachment:
xattr-test.sh
Description: Binary data
David Zafman Senior Developer http://www.inktank.com On Oct 3, 2013, at 11:02 PM, Loic Dachary <loic@xxxxxxxxxxx> wrote: > Hi David, > > Would you mind attaching the script to the mail for completness ? It's a useful thing to have :-) > > Cheers > > On 04/10/2013 01:21, David Zafman wrote: >> >> I want to record with the ceph-devel archive results from testing limits of xattrs for Linux filesystems used with Ceph. >> >> Script that creates xattrs with name user.test1, user.test2, …. on a single file >> 3.10 linux kernel >> >> ext4 >> value bytes number of entries >> 1 148 >> 16 103 >> 256 14 >> 512 7 >> 1024 3 >> 4036 1 >> Beyond this immediately get ENOSPC >> >> btrfs >> value bytes number of entries >> 8 10k >> 16 10k >> 32 10k >> 64 10k >> 128 10k >> 256 10k >> 512 10k slow but worked 1,000,000 got completely hung for minutes at a time during removal strace showed no forward progress >> 1024 10k >> 2048 10k >> 3096 10k >> Beyond this you start getting ENOSPC after fewer entries >> >> xfs (limit entries due to xfs crash with 10k entries) >> value bytes number of entries >> 1 1k >> 8 1k >> 16 1k >> 32 1k >> 64 1k >> 128 1k >> 256 1k >> 512 1k >> 1024 1k >> 2048 1k >> 4096 1k >> 8192 1k >> 16384 1k >> 32768 1k >> 65536 1k >> >> -- >> To unsubscribe from this list: send the line "unsubscribe ceph-devel" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> > > -- > Loïc Dachary, Artisan Logiciel Libre > All that is necessary for the triumph of evil is that good people do nothing. >
