[Lustre-discuss] Enabling async journals while the filesystem is active

[Oleg Drokin]

Hello!

  You would need to upgrade your clients to at least 1.8.2, otherwise you might hit bug 19128
  during replay that would lead to losing some of the data being replayed.
  Version on the routers is not important for async journals feature.

Bye,
    Oleg
On Aug 21, 2010, at 10:06 AM, Erik Froese wrote:

> I think we're going to benefit from it.
> 
> Last question: My clients and routers are still running Lustre
> 1.8.1.1. The MDS/OSSes are on 1.8.3.
> Would you recommend a client upgrade before enabling async journals?
> 
> Erik
> 
> On Fri, Aug 20, 2010 at 9:35 PM, David Dillow <dillowda at ornl.gov> wrote:
>> On Fri, 2010-08-20 at 17:36 -0700, Peter Jones wrote:
>>> Quite. And async journal commits were officially added in 1.8.2.
>>> 
>>> Erik Froese wrote:
>>>> I remember something about a bug during recovery after a crash in 1.8.1.1.
>>>> Erik
>>>> 
>>>> On Fri, Aug 20, 2010 at 8:15 PM, Peter Jones <peter.x.jones at oracle.com> wrote:
>>>> 
>>>>> Really? I had heard of a serious bug before async journal commits were
>>>>> included in a release, but I had understood that things were working well at
>>>>> the few sites running it.
>> 
>> We've been quite happy with it. I recall a bug being reported against
>> them, but IIRC that was actually a longstanding bug that predated async
>> journals. My recollection is foggy, though so perhaps Oleg can set the
>> record straight.
>> --
>> Dave Dillow
>> National Center for Computational Science
>> Oak Ridge National Laboratory
>> (865) 241-6602 office
>> 
>> 
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