Readdir ls -U graphs
From Linux NFS
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=== NFS v3 === | === NFS v3 === | ||
* [[File:v3_ls_U_noplus_rpc.jpg]] | * [[File:v3_ls_U_noplus_rpc.jpg]] | ||
| + | ** 2.6.36 uses fewer RPC operations than 2.6.38 | ||
* [[File:v3_ls_U_plus_rpc.jpg]] | * [[File:v3_ls_U_plus_rpc.jpg]] | ||
| + | ** Kernels using readdir for large directories issue fewer RPC operations than kernels using readdir plus | ||
| + | |||
=== NFS v4 === | === NFS v4 === | ||
* [[File:v4_ls_U_noplus_rpc.jpg]] | * [[File:v4_ls_U_noplus_rpc.jpg]] | ||
| + | ** 2.6.36 kernels issue fewer RPC operations than 2.6.38 kernels | ||
* [[File:v4_ls_U_plus_rpc.jpg]] | * [[File:v4_ls_U_plus_rpc.jpg]] | ||
| + | ** 2.6.36 kernels issue fewer RPC operations than 2.6.38 kernels. 2.6.38 kernels that do a readdir for larger directories issue fewer RPC operations than a 2.6.38 kernel that always does a readdir plus. | ||
Latest revision as of 18:27, 7 April 2011
36: Linux 2.6.36
36NORC: Linux 2.6.36 (without readdir cap)
38: Linux 2.6.38
38RC: Linux 2.6.38 (with readdir cap added back)
38NB: Linux 2.6.38 (with Neil Brown's patch and loop detection)
Contents |
Real
NFS v3
-
-
- In this case, using readdir plus increases the time required for the command to complete.
NFS v4
Sys
NFS v3
-
-
- Using readdir plus causes the command to spend more time in the kernel
NFS v4
RPC ops
NFS v3
-
- 2.6.36 uses fewer RPC operations than 2.6.38
-
- Kernels using readdir for large directories issue fewer RPC operations than kernels using readdir plus
NFS v4
-
- 2.6.36 kernels issue fewer RPC operations than 2.6.38 kernels
-
- 2.6.36 kernels issue fewer RPC operations than 2.6.38 kernels. 2.6.38 kernels that do a readdir for larger directories issue fewer RPC operations than a 2.6.38 kernel that always does a readdir plus.
