[sheepdog] sheep should exit when one store path does not exist

[徐舫]

Sorry for immature thinking.


2014-06-10 21:41 GMT+08:00 徐舫 <xufango at gmail.com>:

> We are doing a test simulating disk fail. The test step is described as
> follows:
>
> 1. start sheep on each node like this:
>
> sheep -n
> /home/admin/sheepdogmetadata/,/disk1/sheepdogstoredata/,/disk2/sheepdogstoredata/,/disk3/sheepdogstoredata/,/disk4/sheepdogstoredata/,/disk5/sheepdogstoredata/,/disk6/sheepdogstoredata/,/disk7/sheepdogstoredata/,/disk8/sheepdogstoredata/,/disk9/sheepdogstoredata/
> -b 0.0.0.0 -y *.*.*.* -c zookeeper:*.*.*.*:2181
>
>
> 2. umount a disk on a node:
>
> sudo umount /disk5
>
>
> 3. then sheep.log on this node output:
>
> Jun 10 20:55:37  ERROR [io 122878] err_to_sderr(96)
> /disk5/sheepdogstoredata corrupted
> Jun 10 20:55:37  ERROR [io 122878] err_to_sderr(96)
> /disk5/sheepdogstoredata corrupted
> Jun 10 20:55:37  ERROR [io 122871] err_to_sderr(96)
> /disk5/sheepdogstoredata corrupted
> Jun 10 20:55:37  ERROR [io 122702] err_to_sderr(96)
> /disk5/sheepdogstoredata corrupted
>
> The log is growing fast, and may fill the log disk.
>
>
> --------------------------------------------------------------------------------------------------------------------------------
>
> Should sheep panic and exit when the store path does not exist?
>
> If sheep on this node does not exit, all vms on other nodes want to read
> or write on this store path may hang.
>
> Do you agree with this?
>
>
> --
> Xu Fang
>
>


-- 
Xu Fang
School of Computer Science and Engineering, Beihang University
State Key Laboratory of Virtual Reality Technology and Systems,
Beijing,P.R.China
Address:
    Beihang University
    Room727, NewMain Building,
    No. 35 Xueyuan Road, Haidian Distric,
    Beijing,P.R.China,100191
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