Giridhar K R wrote: > Hi, > Created a zpool with 64k recordsize and enabled dedupe on it. > zpool create -O recordsize=64k TestPool device1 > zfs set dedup=on TestPool > > I copied files onto this pool over nfs from a windows client. > > Here is the output of zpool list > Prompt:~# zpool list > NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT > TestPool 696G 19.1G 677G 2% 1.13x ONLINE - > > When I ran a "dir /s" command on the share from a windows client cmd, I see > the file size as 51,193,782,290 bytes. The alloc size reported by zpool along > with the DEDUP of 1.13x does not addup to 51,193,782,290 bytes. > > According to the DEDUP (Dedupe ratio) the amount of data copied is 21.58G > (19.1G * 1.13) > > Here is the output from zdb -DD > > Prompt:~# zdb -DD TestPool > DDT-sha256-zap-duplicate: 33536 entries, size 272 on disk, 140 in core > DDT-sha256-zap-unique: 278241 entries, size 274 on disk, 142 in core > > DDT histogram (aggregated over all DDTs): > > bucket allocated referenced > ______ ______________________________ ______________________________ > refcnt blocks LSIZE PSIZE DSIZE blocks LSIZE PSIZE DSIZE > ------ ------ ----- ----- ----- ------ ----- ----- ----- > 1 272K 17.0G 17.0G 17.0G 272K 17.0G 17.0G 17.0G > 2 32.7K 2.05G 2.05G 2.05G 65.6K 4.10G 4.10G 4.10G > 4 15 960K 960K 960K 71 4.44M 4.44M 4.44M > 8 4 256K 256K 256K 53 3.31M 3.31M 3.31M > 16 1 64K 64K 64K 16 1M 1M 1M > 512 1 64K 64K 64K 854 53.4M 53.4M 53.4M > 1K 1 64K 64K 64K 1.08K 69.1M 69.1M 69.1M > 4K 1 64K 64K 64K 5.33K 341M 341M 341M > Total 304K 19.0G 19.0G 19.0G 345K 21.5G 21.5G 21.5G > > dedup = 1.13, compress = 1.00, copies = 1.00, dedup * compress / copies = 1.13 > > > Am I missing something? > > Your inputs are much appritiated. > > Thanks, > Giri >
Giri, You might want to try zfs-discuss or storage-discuss. Thanks, Tom
