Hi Dhruba, Would you consider a contribution of this to branch-0.20-security aka 0.20.2xx.x?
If I am mistaken and you do not have a 0.22-ish HDFS RAID backported to an 0.20-ish platform, please disregard. Best regards, - Andy Problems worthy of attack prove their worth by hitting back. - Piet Hein (via Tom White) >________________________________ >From: Dhruba Borthakur <dhr...@gmail.com> >To: hdfs-user@hadoop.apache.org; Andrew Purtell <apurt...@apache.org> >Sent: Thursday, September 15, 2011 10:14 AM >Subject: Re: Need help regarding HDFS-RAID > > >That's right Andy. 0.22+. We are running a HDFS-RAID code base that is pretty >close to what is available in Apache hdfs trunk. > > >-dhruba > > >On Thu, Sep 15, 2011 at 10:08 AM, Andrew Purtell <apurt...@apache.org> wrote: > >But that is the HDFS RAID effectively in 0.22+, not 0.21, right Dhruba? >> >> >>Best regards, >> >> >> - Andy >> >>Problems worthy of attack prove their worth by hitting back. - Piet Hein (via >>Tom White) >> >> >>>________________________________ >>>From: Dhruba Borthakur <dhr...@gmail.com> >>>To: hdfs-user@hadoop.apache.org >>>Sent: Thursday, September 15, 2011 10:06 AM >>>Subject: Re: Need help regarding HDFS-RAID >>> >>> >>> >>>We use HDFS RAID in a big way. Data older than 12 days are RAIDED using XOR >>>encoding (effective replication of 2.5). Data older than a few months are >>>raided using ReedSolomon (effective observed replication factor of 1.5). >>>This is running on our 60 PB size cluster for about an year now. >>> >>> >>>thanks >>>dhruba >>> >>> >>> >>>On Thu, Sep 15, 2011 at 5:31 AM, Ajit Ratnaparkhi >>><ajit.ratnapar...@gmail.com> wrote: >>> >>>Hi, >>>> >>>> >>>>We were planning to use it for past data archival(instead of moving it to >>>>archival store). >>>>Archiving it in HDFS gives advantage of making it easily available for >>>>processing whenever required. >>>> >>>> >>>>Is there any archival solution in hadoop ecosystem? >>>> >>>> >>>>thanks, >>>>Ajit. >>>> >>>> >>>> >>>>On Thu, Sep 15, 2011 at 5:05 PM, Harsh J <ha...@cloudera.com> wrote: >>>> >>>>Hey Ajit, >>>>> >>>>>HDFS-RAID was never part of the 0.20 release. It made its debut in the >>>>>0.21 release [1]. I know that Facebook uses it (and also did develop >>>>>it), but unsure of users beyond Facebook. >>>>> >>>>>While 0.21 overall is not entirely deemed as production-usable yet >>>>>(and is in fact, possibly abandoned for efforts on 0.22+), you can >>>>>give that release a whirl on a test cluster and see for yourself if >>>>>your need beats the stability. >>>>> >>>>>Just curious though - why are you looking to use this specifically? >>>>> >>>>>[1] - >>>>>http://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.21/mapreduce/src/contrib/raid/ >>>>> >>>>> >>>>>On Thu, Sep 15, 2011 at 4:37 PM, Ajit Ratnaparkhi >>>>><ajit.ratnapar...@gmail.com> wrote: >>>>>> Hi, >>>>>> We want to use HDFS-RAID in our production cluster. >>>>>> (http://wiki.apache.org/hadoop/HDFS-RAID) >>>>>> I am not able to find source/binaries/configs for this in official hadoop >>>>>> distribution from apache hadoop. (checked in 0.20.1 and 0.20.2). >>>>>> Can somebody please tell me where can I find that? and installation >>>>>> procedure? >>>>>> Also, is HDFS-RAID implementation stable enough to use in production? >>>>>> thanks, >>>>>> Ajit. >>>>>> >>>>> >>>>> >>>>> >>>>>-- >>>>>Harsh J >>>>> >>>> >>> >>> >>> >>>-- >>>Connect to me at http://www.facebook.com/dhruba >>> >>> >>> > > > >-- >Connect to me at http://www.facebook.com/dhruba > > >
