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本帖最后由 luckysammo_cu 于 2011-05-27 09:57 编辑
目标:
DRBD + NFS 高可用
环境:
* 千兆交换机 + 千兆网卡
* CentOS release 5.4
* DRBD 8.3.8
* 分区使用ext3,大小1.2T
* mount /dev/drbd0 /data
* NFS共享/data目录
* nfs1 DRBD主节点
* nfs2 DRBD从节点
* client1 NFS客户端
配置文件(两台机配置相同):- global {
- usage-count yes;
- }
- common { syncer { al-extents 3389; rate 70M; } }
- resource r0 {
- protocol C;
- startup {
- wfc-timeout 0;
- degr-wfc-timeout 120;
- }
- disk {
- on-io-error detach;
- }
- net {
- timeout 60;
- connect-int 10;
- ping-int 10;
- max-buffers 2048;
- max-epoch-size 2048;
- }
- on nfs1 {
- device /dev/drbd0;
- disk /dev/cciss/c0d0p4;
- address 192.168.1.3:7789;
- meta-disk internal;
- }
- on nfs2 {
- device /dev/drbd0;
- disk /dev/cciss/c0d0p4;
- address 192.168.1.2:7789;
- meta-disk internal;
- }
- }
复制代码 测试:
写入102MB的文件
1、本机/data目录测试(正常):- [root@nfs1 data]# time dd if=/dev/zero of=sometestfile3 bs=1024 count=100000
- 100000+0 records in
- 100000+0 records out
- 102400000 bytes (102 MB) copied, 0.389642 seconds, 263 MB/s
- real 0m0.398s
- user 0m0.054s
- sys 0m0.320s
复制代码 每秒查看一次/proc/drbd:- [root@nfs1 data]# cat /proc/drbd
- version: 8.3.8 (api:88/proto:86-94)
- GIT-hash: d78846e52224fd00562f7c225bcc25b2d422321d build by mockbuild@builder10.centos.org, 2010-06-04 08:04:09
- 0: cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate C r----
- ns:108772 nr:0 dw:108988 dr:713 al:31 bm:1 lo:8 pe:2049 ua:0 ap:2048 ep:1 wo:b oos:0
- [root@nfs1 data]# cat /proc/drbd
- version: 8.3.8 (api:88/proto:86-94)
- GIT-hash: d78846e52224fd00562f7c225bcc25b2d422321d build by mockbuild@builder10.centos.org, 2010-06-04 08:04:09
- 0: cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate C r----
- ns:109416 nr:0 dw:109576 dr:713 al:31 bm:1 lo:2 pe:2050 ua:0 ap:2049 ep:1 wo:b oos:0
复制代码 PS: 查看dw时,1 秒钟也只同步了 109576 - 108988 = 588
2、NFS客户端测试(nfs1负载飙升):
mount -t nfs -o rsize=32768,wsize=32768,timeo=14,nfsvers=3,noatime,nolock 192.168.1.3:/data /mnt/test
执行:- [root@client1]# time dd if=/dev/zero of=sometestfile3 bs=1024 count=100000
- 100000+0 records in
- 100000+0 records out
- 102400000 bytes (102 MB) copied, 179.556 seconds, 570 kB/s
- real 2m59.588s
- user 0m0.043s
- sys 0m0.256s
复制代码 PS: 570 kB/s
A、nfs1机器:load average从0升到10
B、NFS客户端: 一直卡着,应该是等待从节点同步成功后,再结束。
求助:
请大家帮忙看一下,非常感谢! |
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