（原创）RHCS + GNBD实现基于multipath上的GFS文件系统

gl00ad

如果我有硬件光纤存储设备去实现multipath，有真实服务器，你认为我会用vmware和iscsi去模拟环境吗？
Do not worry, you will have them eventually, just keep going.

traveller2

好文章太长，先顶再看

jerrywjl

原帖由 gl00ad 于 2008-10-26 00:11 发表
如果我有硬件光纤存储设备去实现multipath，有真实服务器，你认为我会用vmware和iscsi去模拟环境吗？
Do not worry, you will have them eventually, just keep going.

HOPE SO! THANKS!

traveller2

看后觉得还是不要用了好。。。
看官方文档也把这段跳过 呵呵

starsseeker

强大的五体投地，赞一个

jerrywjl

不过我想在这里问一下各位：有没有什么更好的iscsi替代产品？在性能和特性上更接近光纤存储？
我不知道multipath切换的问题是不是单纯由iscsi的底层特性引起的。

wysilly

gnbd+infiniband,玩笑.
其实有点钱,可以考虑gpfs,确实很不错,大多数的应用都可满足.生产环境要用成熟产品.有一句话说的好,"追求稳定,然后才提高效率"

[ 本帖最后由 wysilly 于 2008-10-28 13:51 编辑 ]

gl00ad

[root@gnbdclient1 ~]# cat /etc/multipath.conf
blacklist {
         devnode "sda"
}

[root@rh4cluster1 ~]# multipath -v2
create: SIBM-ESXSST336732LC____F3ET0EP0Q000072428BX1
[size=33 GB][features="0"][hwhandler="0"]
Chapter 3. Setting Up DM-Multipath
12
\_ round-robin 0
\_ 0:0:0:0 sda 8:0 [---------

/etc/multipath.conf

blacklist {
wwid SIBM-ESXSST336732LC____F3ET0EP0Q000072428BX1
}

from redhat DM-Multipath -- best practice

Although you could
blacklist the sda device using a devnode type, that would not be safe procedure since
/dev/sda is not guaranteed to be the same on reboot. To blacklist individual devices, you
can blacklist using the WWID of that device

.

[ 本帖最后由 gl00ad 于 2008-10-29 09:48 编辑 ]

jerrywjl

原帖由 gl00ad 于 2008-10-29 09:46 发表





from redhat DM-Multipath -- best practice
.

一般碰到的情况是在有多个SCSI控制器连接外部存储有这种问题，不过通常/dev/sda还是会比较稳定。

gl00ad

I know LVS use pulse as heartbeat to monitor status of active LVS node, what does RHCS CMAN use as heartbeat?

I read all the document I have, I cannot seem able to find it, so there is no separate heartbeat package? is it just a hello message from CMAN?


I did see you mentioned it on the graph but none at texts. there are so many people here asking for how to install heartbeat, keepalive etc, it really confuse me.

Thanks

[ 本帖最后由 gl00ad 于 2008-10-30 05:08 编辑 ]