BeeGFS High Availability

[Atul Yadav]

Hi Team,

I am evaluating Beegfs for my production environment.

But High availability OR Fail-over concept is not clear.

Please guide me in achieving the High availability solution with the help of the 2 server nodes.

Thank in advance 

Atul Yadav

[Harry Mangalam]

There are 2 levels of HA built into the recent versions of BeeGFS (versions after the 2015.03)

The 1st is the metadata buddy system in which you can define 2 metadata servers, a primary and a secondary and the primary will automatically fail over to the secondary,  these can be on separate metadata servers or they can also run on the storage servers (altho if so, a failure of such a combined server would not bode well for the system).

The 2nd  is a buddy storage mirroring, so you can assign a mirror dir that receives the same data as the primary.  If the primary goes down, the secondary can immediately pick up and continue to service requests.

The downside of the storage mirror is that it doubles the storage costs for the data that you decide to mirror (it does not have to be the whole filesystem).  The upside is data protection for the cost of ONLY the duplicated hardware.

See:  https://www.beegfs.io/wiki/AboutMirroring

If this misrepresents what is actually the case, please correct! 

hjm

[supe...@163.com]

nodetype= storage

TargetID     Reachability  Consistency   NodeID

========     ============  ===========   ======

       1           Online         Good       63

       2           Online         Good       64

       3           Online         Good       65

     

BuddyGroupID     PrimaryNodeID   SecondaryNodeID

     ============     =============   ===============

               10                 1                 2

if i shutdown one storage node , while running Mysql test, as result Mysql test will be stopped. the mirrorgroups seems doesn`t working.

how to make the high availability working.

thanks a lot.

superdou007
在 2017年8月22日星期二 UTC+8上午3:04:23，Atul Yadav写道：

[Nick Tan]

You need to make sure that the directory you are working on is configured to use the buddy group.

 

If you run ‘beegfs-ctl --getentryinfo <directory>’ does it show Type: Buddy Mirror?

 

If not, you can set it by running ‘beegfs-ctl --setpattern --chunksize=1M --numtargets=1 --buddymirror <directory>’

 

You’ll need to copy any data out of that directory and back in again for the buddy mirror setting to apply.  I’ve set the numtargets to 1 as it looks like you only have the 1 buddy group configured.

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[super.dou]

I have makes it ok now.

Because of the mysql isn`t installing  in the beegfs mirror file.

as you see the storage target shuld be at leatst two in one stroage node to make buddy group work well.

If down one storage node the system file will be hang at leat 30s, then the file can`t write but can read.

we can reduce the timeout cost time.

           thank you !

 原始邮件 

发件人: Nick Tan<nick...@spookfish.com>

收件人: fhgfs...@googlegroups.com<fhgfs...@googlegroups.com>

发送时间: 2018年9月10日(周一) 16:20

主题: Re: [beegfs-user] Re: BeeGFS High Availability

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