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 majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html