RAID 10 provide best performance (much better than raid 6) Cordialement, Mathieu CHATEAU http://www.lotp.fr
2016-01-13 5:35 GMT+01:00 Pranith Kumar Karampuri <[email protected]>: > +gluster-users > > On 01/13/2016 09:44 AM, Pawan Devaiah wrote: > > We would be looking for redundancy so replicated volumes I guess > > If replication is going to be there, why additional RAID10? You can do > just RAID6, it saves on space and replication in glusterfs will give > redundancy anyways. > > Pranith > > > Thanks, > Dev > > On Wed, Jan 13, 2016 at 5:07 PM, Pranith Kumar Karampuri < > [email protected]> wrote: > >> >> >> On 01/13/2016 02:21 AM, Pawan Devaiah wrote: >> >> Thanks for the response Pranith >> >> If we take EC out of the equation and say I go with RAID on the physical >> disk, do you think GlusterFS is good for the 2 workloads that I mentioned >> before. >> >> Basically it is going to be a NFS storage for VM and data but with >> different RAIDs, 10 for VM and 6 for data. >> >> What will be the kind of volume you will be using with these disks? >> >> Pranith >> >> Thanks >> Dev >> >> On Tue, Jan 12, 2016 at 9:46 PM, Pranith Kumar Karampuri < >> [email protected]> wrote: >> >>> >>> >>> On 01/12/2016 01:26 PM, Pawan Devaiah wrote: >>> >>> Thanks for your response Pranith and Mathieu, >>> >>> Pranith: To answer your question, I am planning to use this storage for >>> two main workloads. >>> >>> 1. As a shared storage for VMs. >>> >>> EC as it is today is not good for this. >>> >>> 2. As a NFS Storage for files. >>> >>> If the above is for storing archive data. EC is nice here. >>> >>> Pranith >>> >>> >>> We are a online backup company so we store few hundred Terra bytes of >>> data. >>> >>> >>> Mathieu: I appreciate your concern, however as a system admins sometimes >>> we get paranoid and try to control everything under the Sun. >>> I know I can only control what I can. >>> >>> Having said that, No, I have pair of servers to start with so at the >>> moment I am just evaluating and preparing for proof of concept, after which >>> I am going to propose to my management, if they are happy then we will >>> proceed further. >>> >>> Regards, >>> Dev >>> >>> On Tue, Jan 12, 2016 at 7:30 PM, Mathieu Chateau < >>> [email protected]> wrote: >>> >>>> Hello, >>>> >>>> For any system, 36 disks raise disk failure probability. Do you plan >>>> GlusterFS with only one server? >>>> >>>> You should think about failure at each level and be prepared for it: >>>> >>>> - Motherboard failure (full server down) >>>> - Disks failure >>>> - Network cable failure >>>> - File system corruption (time needed for fsck) >>>> - File/folder removed by mistake (backup) >>>> >>>> Using or not raid depend on your answer on these questions and >>>> performance needed. >>>> It also depend how "good" is raid controller in your server, like if it >>>> has battery and 1GB of cache. >>>> >>>> When many disks are bought at same time (1 order, serial number close >>>> to each other), they may fail in near time to each other (if something bad >>>> happened in manufactory). >>>> I already saw like 3 disks failing in few days. >>>> >>>> just my 2 cents, >>>> >>>> >>>> >>>> Cordialement, >>>> Mathieu CHATEAU >>>> http://www.lotp.fr >>>> >>>> 2016-01-12 4:36 GMT+01:00 Pranith Kumar Karampuri <[email protected]> >>>> : >>>> >>>>> >>>>> >>>>> On 01/12/2016 04:34 AM, Pawan Devaiah wrote: >>>>> >>>>> Hi All, >>>>> >>>>> We have a fairly powerful server sitting at office with 128 Gig RAM >>>>> and 36 X 4 TB drives. I am planning to utilize this server as a backend >>>>> storage with GlusterFS on it. >>>>> I have been doing lot of reading on Glusterfs, but I do not see any >>>>> definite recommendation on having RAID on GLUSTER nodes. >>>>> Is it recommended to have RAID on GLUSTER nodes specially for the >>>>> bricks? >>>>> If Yes, is it not contrary to the latest Erasure code implemented in >>>>> Gluster or is it still not ready for production environment? >>>>> I am happy to implement RAID but my two main concern are >>>>> 1. I want to make most of the disk space available. >>>>> 2. I am also concerned about the rebuild time after disk failure on >>>>> the RAID. >>>>> >>>>> What is the workload you have? >>>>> >>>>> We found in our testing that random read/write workload with Erasure >>>>> coded volumes is not as good as we get with replication. There are >>>>> enhancements in progress at the moment to address these things which we >>>>> are >>>>> yet to merge and re-test. >>>>> >>>>> Pranith >>>>> >>>>> >>>>> Thanks >>>>> Dev >>>>> >>>>> >>>>> >>>>> >>>>> _______________________________________________ >>>>> Gluster-users mailing >>>>> [email protected]http://www.gluster.org/mailman/listinfo/gluster-users >>>>> >>>>> >>>>> >>>>> _______________________________________________ >>>>> Gluster-users mailing list >>>>> [email protected] >>>>> http://www.gluster.org/mailman/listinfo/gluster-users >>>>> >>>> >>>> >>> >>> >> >> > > > _______________________________________________ > Gluster-users mailing list > [email protected] > http://www.gluster.org/mailman/listinfo/gluster-users >
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