Hi all,
I did some experiments on geo-replication.
# gluster volume info
Source site:
Volume Name: source
Type: Disperse
Volume ID: 1b6f0353-b4f2-4a1e-9f4a-157e90dafc07
Status: Started
Number of Bricks: 1 x (2 + 1) = 3
Transport-type: tcp
Bricks:
Brick1: giting1:/export/sor_bk1/fs
Brick2: giting2:/export/sor_bk2/fs
Brick3: giting3:/export/sor_bk3/fs
Options Reconfigured:
performance.readdir-ahead: on
geo-replication.indexing: on
geo-replication.ignore-pid-check: on
changelog.changelog: on
Target site:
Volume Name: target
Type: Disperse
Volume ID: eec13159-5a3a-4e64-a89a-81185e8bbdbf
Status: Started
Number of Bricks: 1 x (2 + 1) = 3
Transport-type: tcp
Bricks:
Brick1: giting4:/export/tar_bk1/fs
Brick2: giting5:/export/tar_bk2/fs
Brick3: giting6:/export/tar_bk3/fs
Options Reconfigured:
performance.readdir-ahead: on
To begin with, the first step is to use the georepsetup succeeded to create a geo-replication.
MASTER NODE MASTER VOL MASTER BRICK SLAVE USER SLAVE SLAVE NODE STATUS CRAWL STATUS LAST_SYNCED
--------------------------------------------------------------------------------------------------------------------------------------------------------
giting1 source /export/sor_bk1/fs root ssh://giting4::target giting6 Active Changelog Crawl 2016-07-26 17:13:54
giting3 source /export/sor_bk3/fs root ssh://giting4::target giting4 Passive N/A N/A
giting2 source /export/sor_bk2/fs root ssh://giting4::target giting5 Passive N/A N/A
Next, we can compare two way, 'fuse' and 'glfsapi', to create and write a file.
In the beginning of the experiment by using 'fuse' to create and write a file, it work well.
By using 'glfsapi' to create and write a file, it failed with following message.
Source site log:
[2016-07-26 09:35:44.886520] E [fuse-bridge.c:3374:fuse_xattr_cbk] 0-glusterfs-fuse: extended attribute not supported by the backend storage
Target site log:
[2016-07-26 09:35:45.177060] E [MSGID: 122065] [ec-common.c:961:ec_prepare_update_cbk] 0-target-disperse-0: Unable to get config xattr [No data available]
[2016-07-26 09:35:45.219461] E [MSGID: 122034] [ec-common.c:461:ec_child_select] 0-target-disperse-0: Insufficient available childs for this request (have 0, need 2)
[2016-07-26 09:35:45.219496] W [MSGID: 122040] [ec-common.c:919:ec_prepare_update_cbk] 0-target-disperse-0: Failed to get size and version [Input/output error]
[2016-07-26 09:35:45.228818] W [fuse-bridge.c:709:fuse_truncate_cbk] 0-glusterfs-fuse: 64: FTRUNCATE() ERR => -1 (Input/output error)
The message "E [MSGID: 122065] [ec-common.c:961:ec_prepare_update_cbk] 0-target-disperse-0: Unable to get config xattr [No data available]" repeated 3 times between [2016-07-26 09:35:45.177060] and [2016-07-26 09:35:45.230205]
Thanks
Giting
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