From 5d0b17f1a29e8189d04aef447a3a53cfd05529b2 Mon Sep 17 00:00:00 2001 From: Philipp Reisner Date: Tue, 18 Mar 2014 14:24:35 +0100 Subject: 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 Signed-off-by: Lars Ellenberg --- include/linux/drbd_limits.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/linux/drbd_limits.h') 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 -- cgit v1.2.3