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From Furkan KAMACI <furkankam...@gmail.com>
Subject Re: Storing Solr Index on NFS
Date Tue, 16 Apr 2013 11:15:41 GMT
Hi Walter;

You said: "It is not safe to share Solr index files between two Solr
servers". Why do you think like that?


2013/4/16 Tim Vaillancourt <tim@elementspace.com>

> If centralization of storage is your goal by choosing NFS, iSCSI works
> reasonably well with SOLR indexes, although good local-storage will always
> be the overall winner.
>
> I noticed a near 5% degredation in overall search performance (casual
> testing, nothing scientific) when moving a 40-50GB indexes to iSCSI (10GBe
> network) from a 4x7200rpm RAID 10 local SATA disk setup.
>
> Tim
>
>
> On 15/04/13 09:59 AM, Walter Underwood wrote:
>
>> Solr 4.2 does have field compression which makes smaller indexes. That
>> will reduce the amount of network traffic. That probably does not help
>> much, because I think the latency of NFS is what causes problems.
>>
>> wunder
>>
>> On Apr 15, 2013, at 9:52 AM, Ali, Saqib wrote:
>>
>>  Hello Walter,
>>>
>>> Thanks for the response. That has been my experience in the past as well.
>>> But I was wondering if there new are things in Solr 4 and NFS 4.1 that
>>> make
>>> the storing of indexes on a NFS mount feasible.
>>>
>>> Thanks,
>>> Saqib
>>>
>>>
>>> On Mon, Apr 15, 2013 at 9:47 AM, Walter Underwood<wunder@wunderwood.**
>>> org <wunder@wunderwood.org>>wrote:
>>>
>>>  On Apr 15, 2013, at 9:40 AM, Ali, Saqib wrote:
>>>>
>>>>  Greetings,
>>>>>
>>>>> Are there any issues with storing Solr Indexes on a NFS share? Also any
>>>>> recommendations for using NFS for Solr indexes?
>>>>>
>>>> I recommend that you do not put Solr indexes on NFS.
>>>>
>>>> It can be very slow, I measured indexing as 100X slower on NFS a few
>>>> years
>>>> ago.
>>>>
>>>> It is not safe to share Solr index files between two Solr servers, so
>>>> there is no benefit to NFS.
>>>>
>>>> wunder
>>>> --
>>>> Walter Underwood
>>>> wunder@wunderwood.org
>>>>
>>>>
>>>>
>>>>
>>>>  --
>> Walter Underwood
>> wunder@wunderwood.org
>>
>>
>>
>>
>>

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