[sheepdog-users] Concern about sheepdog performance

[Valerio Pachera]

Hi, I found this page of the archive
  http://www.mail-archive.com/sheepdog@lists.wpkg.org/msg00932.html

There's reported about my same data (5-10M/s).
It also reports that disabling barrier when mounting filesystem, we
should gain lot's of performance.
I wanted to try that!

I updated my sheepdog to latest develop version (0.5.5_19_g395c05c).
3 nodes, copies 2.
I also tried to add allocsize=4M because I know sheepdog uses file of 4M.
Is it a good idea?

mount (xfs): -o noatime,barrier=0,allocsize=4M
sheep -D /mnt/sheepdog
kvm -drive file=sheepdog:test,cache=none
  16M/s

(the same, but without spcifing cache on qemu)
mount (xfs): -o noatime,barrier=0,allocsize=4M
sheep -D /mnt/sheepdog
kvm -drive file=sheepdog:test
  15.3M

---------

Now I wanted to run sheep without '-D'; I shutdown the cluster, re-run
'sheep /mnt/sheepdog' but only one node started the daemon.
On the other two, in sheep.log we find:

Dec 18 11:02:57 [main] send_join_request(1014) IPv4 ip:192.168.2.41 port:7000
Dec 18 11:02:57 [main] farm_init(118) xattrs are not enabled on
/mnt/sheepdog/obj/
Dec 18 11:02:57 [main] crash_handler(324) sheep pid 15494 exited unexpectedly.
Dec 18 11:02:57 [main] jrnl_recover(230) opening the directory
/mnt/sheepdog/journal/
Dec 18 11:02:57 [main] jrnl_recover(235) starting journal recovery
Dec 18 11:02:57 [main] jrnl_recover(291) journal recovery complete

Dec 18 10:54:28 [main] send_join_request(1014) IPv4 ip:192.168.2.43 port:7000
Dec 18 10:54:28 [main] farm_init(118) xattrs are not enabled on
/mnt/sheepdog/obj/
Dec 18 10:54:28 [main] crash_handler(324) sheep pid 13656 exited unexpectedly.
Dec 18 10:54:28 [main] jrnl_recover(230) opening the directory
/mnt/sheepdog/journal/
Dec 18 10:54:28 [main] jrnl_recover(235) starting journal recovery
Dec 18 10:54:28 [main] jrnl_recover(291) journal recovery complete

*On the node with the running daemon*
Dec 18 10:51:37 [main] send_join_request(1014) IPv4 ip:192.168.2.42 port:7000
Dec 18 10:51:37 [main] main(616) sheepdog daemon (version
0.5.5_19_g395c05c) started
Dec 18 10:51:37 [main] update_cluster_info(799) status = 2, epoch = 0,
finished: 0
Dec 18 10:51:41 [main] sd_check_join_cb(974) 192.168.2.43:7000: ret =
0x0, cluster_status = 0x2
Dec 18 10:54:03 [main] sd_check_join_cb(974) 192.168.2.43:7000: ret =
0x0, cluster_status = 0x2
Dec 18 10:54:25 [main] sd_check_join_cb(974) 192.168.2.43:7000: ret =
0x0, cluster_status = 0x2

Is it better to not use the development verion for testing?