[Gluster-users] [3.1 Beta] some questions

[Tomoaki Sato]

Hi,

I'm trying glusterfs-3.1.0beta in my environment and have following questions.

1) Can I start/stop volumes from any servers?

I have 5 servers and a volume 'vol1'on them. 
It seems that 'gluster volume start vol1' returns immediately at
head-001(10.200.20.1) but does not return at another servers.

[root at head-001 ~]# gluster peer status
Number of Peers: 4
hostname:10.200.20.2, uuid:f651680b-3b0a-4675-b4b6-c8d8e62e741c, state:3 (connected)
hostname:10.200.20.3, uuid:e2897fcb-320a-4aee-abd1-78726855c241, state:3 (connected)
hostname:10.200.20.4, uuid:6c8f8d61-ed37-4d87-b1ef-594ffacd1a94, state:3 (connected)
hostname:10.200.20.5, uuid:ac1a1b49-e8c8-4fbd-bafa-4f459f7bc96f, state:3 (connected)
[root at head-001 ~]# gluster volume info

Volume Name: vol1
Type: Distribute
Status: Started
Number of Bricks: 5
Transport-type: tcp
Bricks:
Brick1: 10.200.20.1:/export
Brick2: 10.200.20.2:/export
Brick3: 10.200.20.3:/export
Brick4: 10.200.20.4:/export
Brick5: 10.200.20.5:/export


2) Can I expect same or higher I/O performance lower cpu usage compare to 3.0.5 ?
 
bonnie++ results (3.1.0beta vs. 3.0.5) in the same 5 servers:

3.0.5:
Version 1.00e       ------Sequential Output------ --Sequential Input- --Random-
                    -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine        Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP  /sec %CP
head-001      3272M 39162  56 42654   3  5931   0 41497  57 110721   5   9.3   0
                    ------Sequential Create------ --------Random Create--------
                    -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
              files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP
                 30   146   0 15777  10   442   0   133   0  3865   1  1295   0
head-001,3272M,39162,56,42654,3,5931,0,41497,57,110721,5,9.3,0,30,146,0,15777,10,442,0,133,0,3865,1,1295,0

3.1.0beta:
Version 1.00e       ------Sequential Output------ --Sequential Input- --Random-
                    -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine        Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP  /sec %CP
head-001      3272M 31484  42 41621   2  2206   0 31333  36 46535   2   4.2   0
                    ------Sequential Create------ --------Random Create--------
                    -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
              files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP
                 30   194   0  8314   2  1169   0   190   0  2943   0   976   0
head-001,3272M,31484,42,41621,2,2206,0,31333,36,46535,2,4.2,0,30,194,0,8314,2,1169,0,190,0,2943,0,976,0

3) When and what keys should I change the value? and how should I review the current values ?

volume set <VOLNAME> <KEY> <VALUE> - set options for volume <VOLNAME>

Thanks,

Tomo Sato