Gaurav Bafna bafna
bafna
/ latency.txt
Created
October 15, 2016 16:02
— forked from jboner/latency.txt
Latency Numbers Every Programmer Should Know
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| Latency Comparison Numbers | |
| -------------------------- | |
| L1 cache reference 0.5 ns | |
| Branch mispredict 5 ns | |
| L2 cache reference 7 ns 14x L1 cache | |
| Mutex lock/unlock 25 ns | |
| Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
| Compress 1K bytes with Zippy 3,000 ns 3 us | |
| Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
| Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |
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| { | |
| "state": "active+undersized+degraded", | |
| "snap_trimq": "[]", | |
| "epoch": 9129, | |
| "up": [ | |
| 2409, | |
| 1797, | |
| 1418, | |
| 2178, | |
| 821 |
bafna
/ gist:6b87b428bc16562fe2f2
Created
July 30, 2015 10:12
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| Selecting previously unselected package ceph. | |
| (Reading database ... 183690 files and directories currently installed.) | |
| Preparing to unpack ceph_0.91-2147-gfb909a9-1_amd64.deb ... | |
| Unpacking ceph (0.91-2147-gfb909a9-1) ... | |
| Selecting previously unselected package ceph-common. | |
| Preparing to unpack ceph-common_0.91-2147-gfb909a9-1_amd64.deb ... | |
| Unpacking ceph-common (0.91-2147-gfb909a9-1) ... | |
| Selecting previously unselected package ceph-fs-common. | |
| Preparing to unpack ceph-fs-common_0.91-2147-gfb909a9-1_amd64.deb ... | |
| Unpacking ceph-fs-common (0.91-2147-gfb909a9-1) ... |
bafna
/ gist:7bd775b34ddc3d2092a7
Created
July 28, 2015 04:52
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| Selecting previously unselected package ceph. | |
| (Reading database ... 93598 files and directories currently installed.) | |
| Preparing to unpack ceph_0.91-5072-gda187c8-1_amd64.deb ... | |
| Unpacking ceph (0.91-5072-gda187c8-1) ... | |
| Selecting previously unselected package ceph-common. | |
| Preparing to unpack ceph-common_0.91-5072-gda187c8-1_amd64.deb ... | |
| Unpacking ceph-common (0.91-5072-gda187c8-1) ... | |
| Preparing to unpack ceph-fs-common_0.91-5072-gda187c8-1_amd64.deb ... | |
| Unpacking ceph-fs-common (0.91-5072-gda187c8-1) over (0.91-5072-gda187c8-1) ... | |
| Preparing to unpack ceph-fuse_0.91-5072-gda187c8-1_amd64.deb ... |
bafna
/ gist:f3e82bc7b6af9b367f92
Created
July 27, 2015 13:51
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| Synchronizing submodule url for 'ceph-erasure-code-corpus' | |
| Synchronizing submodule url for 'ceph-object-corpus' | |
| Synchronizing submodule url for 'src/civetweb' | |
| Synchronizing submodule url for 'src/erasure-code/jerasure/gf-complete' | |
| Synchronizing submodule url for 'src/erasure-code/jerasure/jerasure' | |
| Synchronizing submodule url for 'src/gmock' | |
| Synchronizing submodule url for 'src/libs3' | |
| Synchronizing submodule url for 'src/rocksdb' | |
| Submodule path 'ceph-erasure-code-corpus': checked out '4957a9a0fb0af6ff992ed6955257279281d99bc0' | |
| Submodule path 'ceph-object-corpus': checked out 'da43eb119558fb46d86e62f3b82d5ca63546f69e' |