-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 > Probably the big question is what are the pain points? The most common > answer we get when asking folks what applications they run on top of Ceph is > "everything!". This is wonderful, but not helpful when trying to figure out > what performance issues matter most! :) > > IE, should we be focusing on IOPS? Latency? Finding a way to avoid journal > overhead for large writes? Are there specific use cases where we should > specifically be focusing attention? general iscsi? S3? databases directly > on RBD? etc. There's tons of different areas that we can work on (general > OSD threading improvements, different messenger implementations, newstore, > client side bottlenecks, etc) but all of those things tackle different kinds > of problems. We run "everything" or it sure seems like it. I did some computation of a large sampling of our servers and found that the average request size was ~12K/~18K (read/write) and ~30%/70% (it looks like I didn't save that spreadsheet to get exact numbers). So, any optimization in smaller I/O sizes would really benefit us - ---------------- Robert LeBlanc PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1 -----BEGIN PGP SIGNATURE----- Version: Mailvelope v1.0.0 Comment: https://www.mailvelope.com wsFcBAEBCAAQBQJV1ONDCRDmVDuy+mK58QAAGZMP/2jZk2ScXzJP0kpvVpCZ pHn74r2tR2gwpzSDzFp2az5L36DutrJImDx/wDZnxsuA6v1sUWiW3/VBwm8r LRHr0jHvVm5EnpyJuT7zPRg/aJhXcK9hlIuud3tQ357BtMb0Hv6rbVclqtoP RCYFoWv6vHVg0nmbKyZODj9W4PWfb6AjXazwHlgZw10q1GcYSs5LS2n9Yx8B Q8hpn/8mf49IopYuyBOH5VTIxOUGlv1XAUD4kSRSYvhFLMQg0lt7L1VZrbiY qqFtMUlvSoasb7eFahYZskkjUPB9c9kplWjKkKo8K7nV40pUfg8yClZmZ0kl a4gok35Cn8x58rWBrSpMEqAvr5ObE27LNnwGhy9KfzdkMpdWS2/lr7oZsb+O Gwk/4/u4hWbjuYSeGsqXefFINgRjl8TPOTQ7ZawlOcxsJhnyiGwWa5jXypHZ Smju6lEKMd9XvoBHtRBk+wX08E/T/U6pZplOpRwG8jV5xQtrF9B9AEiQoMTj x4HWdD17O9DcW5veiPkDzf9onkrbWZdcYjTXwdKqm6q0vEvk4stcLTfgjCVu +zqcgcbCyvw/URNmVjAHH3dSkfmrFBHuLW062hYhSnPlqgSBJ6xTwFzQSIIZ ZcDOfQIR72l5mLLg/YAvOMljhUnwZjdURRJytYG5KsdzZRWJZ9bWd+n2ZwfZ Yf4H =bSAx -----END PGP SIGNATURE----- _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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