PsiCzar Posted July 4, 2013 Share Posted July 4, 2013 Taken from an Ars Technica article on Facebook's DIY servers Each storage server has 2 trays of 15 4TB drives, that's a lot of disk space in what looks like a 2RU chassis. Wonder if they take orders Link to comment
Dephcon Posted July 4, 2013 Share Posted July 4, 2013 OCP Knox. They're pretty cool, we're looking at them and OCP servers for Hadoop at work. http://www.opencompute.org/ Link to comment
mrow Posted July 4, 2013 Share Posted July 4, 2013 How do they keep them cool? You can see the cooling better in this picture. Six rows of two 60mm fans. The fans are mounted on a modular bracket so if a fan dies you pop the bracket out and put a new one in. Link to comment
speeding_ant Posted July 4, 2013 Share Posted July 4, 2013 I wonder how you interface with the storage.. are they presented as LUNs, FC? Link to comment
Brian B. Posted July 5, 2013 Share Posted July 5, 2013 docs say they are just using SAS and expander boards. Link to comment
speeding_ant Posted July 5, 2013 Share Posted July 5, 2013 Interesting, I guess they just need slow and cheap storage. Object storage I guess... Link to comment
Brian B. Posted July 5, 2013 Share Posted July 5, 2013 From what I've read, they have entire servers (hundreds/thousands) set up as dedicated memcache servers because they found that SSD wasn't fast enough, I think I read that they transitioned away from SQL to nosql databases because of the severe level of data distribution they need. Photos have presented a special challenge, as most people only look at recent photo albums, but expect all their photos to be "instantly" available even though they never get looked at. Hence Facebook's desire for a "cold storage" technology hard drive (see my other post.) Link to comment
nickcardwell Posted July 5, 2013 Share Posted July 5, 2013 one of the best high density one's i have seen is the nexsan server 4u height , 3 bays with each bay having 20 disks, total capacity 60 disks in 4 u cabinet. Powers down when not in use. Link to comment
Dephcon Posted July 6, 2013 Share Posted July 6, 2013 From what I've read, they have entire servers (hundreds/thousands) set up as dedicated memcache servers because they found that SSD wasn't fast enough, I think I read that they transitioned away from SQL to nosql databases because of the severe level of data distribution they need. Photos have presented a special challenge, as most people only look at recent photo albums, but expect all their photos to be "instantly" available even though they never get looked at. Hence Facebook's desire for a "cold storage" technology hard drive (see my other post.) You can do something similar with openstack swift. It's kinda like hadoop without all the metadata object storage stuff. Link to comment
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