Hello Mathieu, Thank you for replying. What do you think about reconstructing every RAID VD with 128KB stripe size? Indeed, with this value, if one day i decide to use stripped volume, 128KB is the common value of logical stripe size.
Thanks again, Have a nice end-of-weekend Amicalement, Geoffrey ------------------------------------------------------ Geoffrey Letessier Responsable informatique & ingénieur système UPR 9080 - CNRS - Laboratoire de Biochimie Théorique Institut de Biologie Physico-Chimique 13, rue Pierre et Marie Curie - 75005 Paris Tel: 01 58 41 50 93 - eMail: [email protected] Le 12 juil. 2015 à 11:49, Mathieu Chateau <[email protected]> a écrit : > Hello, > > If these 4 virtual drives are then put together to get one big volume, it > will goes as the slower one. > I would put the LSI to 64K to get same size everywhere anyway, even if it's > transparent/hidden from an OS perspective > > > Cordialement, > Mathieu CHATEAU > http://www.lotp.fr > > 2015-07-12 11:16 GMT+02:00 Geoffrey Letessier <[email protected]>: > Dear all, > > Because I’m currently reconstructing all my GlusterFS volumes, I just noticed > that all of my RAID virtual drives did not necessarily have the same stripe > size and I wonder whether it would be better to reconstruct/rebuild these > virtual drives with the same stripe size ... What do you recommend ? > > Actually, 2 virtual drives of 4 have a stripe size set to 64KB (Dell Perc > H8xx RAID controller default settings) and the 2 left are set to 256KB (LSI > MegaRAID 9286-8e default settings). With iozone tests, i notice Dell Perc VD > have better results than LSI ones. (~1.3-4GBs vs ~1.2GBs) and I wonder if > these parameters are not in cause... > > It’s very urgent for me to know what i have to do because I need to > reconstruct and set all my volumes and back transfert roughly 40TBs in > distributed and replicated volumes as quickly as possible… > > Thanks by advance, > Geoffrey > ------------------------------------------------------ > Geoffrey Letessier > Responsable informatique & ingénieur système > UPR 9080 - CNRS - Laboratoire de Biochimie Théorique > Institut de Biologie Physico-Chimique > 13, rue Pierre et Marie Curie - 75005 Paris > Tel: 01 58 41 50 93 - eMail: [email protected] > > _______________________________________________ > Gluster-users mailing list > [email protected] > http://www.gluster.org/mailman/listinfo/gluster-users >
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