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| author | Philipp Reisner <philipp.reisner@linbit.com> | 2014-03-18 14:24:35 +0100 |
|---|---|---|
| committer | Philipp Reisner <philipp.reisner@linbit.com> | 2014-07-10 18:35:01 +0200 |
| commit | 5d0b17f1a29e8189d04aef447a3a53cfd05529b2 (patch) | |
| tree | 2d53fe259fd70241a40f33438b4b3676676bbf2c /include/linux/drbd_limits.h | |
| parent | 4920e37a9e851172158ecc0fd7e060712dc1b5e8 (diff) | |
| download | lwn-5d0b17f1a29e8189d04aef447a3a53cfd05529b2.tar.gz lwn-5d0b17f1a29e8189d04aef447a3a53cfd05529b2.zip | |
drbd: New net configuration option socket-check-timeout
In setups involving a DRBD-proxy and connections that experience a lot of
buffer-bloat it might be necessary to set ping-timeout to an
unusual high value. By default DRBD uses the same value to wait if a newly
established TCP-connection is stable. Since the DRBD-proxy is usually located
in the same data center such a long wait time may hinder DRBD's connect process.
In such setups socket-check-timeout should be set to
at least to the round trip time between DRBD and DRBD-proxy. I.e. in most
cases to 1.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Diffstat (limited to 'include/linux/drbd_limits.h')
| -rw-r--r-- | include/linux/drbd_limits.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/drbd_limits.h b/include/linux/drbd_limits.h index 9d2df1d51414..8ac8c5d9a3ad 100644 --- a/include/linux/drbd_limits.h +++ b/include/linux/drbd_limits.h @@ -225,4 +225,9 @@ #define DRBD_AL_STRIPE_SIZE_MAX 16777216 #define DRBD_AL_STRIPE_SIZE_DEF 32 #define DRBD_AL_STRIPE_SIZE_SCALE 'k' /* kilobytes */ + +#define DRBD_SOCKET_CHECK_TIMEO_MIN 0 +#define DRBD_SOCKET_CHECK_TIMEO_MAX DRBD_PING_TIMEO_MAX +#define DRBD_SOCKET_CHECK_TIMEO_DEF 0 +#define DRBD_SOCKET_CHECK_TIMEO_SCALE '1' #endif |