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drbd: Changed some defaults

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* Enabled the resync controller, with a fill target of 50Kib. That gives
  reasonable resync speeds without tuning. A much better default than
  the 250KiB/s fixed.

* Enable bitmap compression. It is save to use, and most people have
  more CPU power than network bandwidth.

* ko-count of 7: Abort a connection if the peer fails to process a
  write request within 42 seconds.

* al-extents of 1237: ~5 GiB seems to be a much more sane default
  these days.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
This commit is contained in:
Philipp Reisner 2011-07-13 10:24:51 +02:00
parent 367d675da8
commit 65d94927e0
1 changed files with 7 additions and 7 deletions
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14
include/linux/drbd_limits.h
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@ -16,7 +16,7 @@
#define DEBUG_RANGE_CHECK 0
#define DRBD_MINOR_COUNT_MIN 1
#define DRBD_MINOR_COUNT_MAX 256
#define DRBD_MINOR_COUNT_MAX (1U << 20)
#define DRBD_MINOR_COUNT_DEF 32
#define DRBD_VOLUME_MAX 65535
@ -99,7 +99,7 @@
* 200 should be more than enough even for very short timeouts */
#define DRBD_KO_COUNT_MIN 0
#define DRBD_KO_COUNT_MAX 200
#define DRBD_KO_COUNT_DEF 0
#define DRBD_KO_COUNT_DEF 7
/* } */
/* syncer { */
@ -117,7 +117,7 @@
* 919 * 7 = 6433 */
#define DRBD_AL_EXTENTS_MIN 7
#define DRBD_AL_EXTENTS_MAX 6433
#define DRBD_AL_EXTENTS_DEF 127
#define DRBD_AL_EXTENTS_DEF 1237
#define DRBD_MINOR_NUMBER_MIN -1
#define DRBD_MINOR_NUMBER_MAX (1<<30)
@ -151,7 +151,7 @@
#define DRBD_C_PLAN_AHEAD_MIN 0
#define DRBD_C_PLAN_AHEAD_MAX 300
#define DRBD_C_PLAN_AHEAD_DEF 0 /* RS rate controller disabled by default */
#define DRBD_C_PLAN_AHEAD_DEF 20
#define DRBD_C_DELAY_TARGET_MIN 1
#define DRBD_C_DELAY_TARGET_MAX 100
@ -159,7 +159,7 @@
#define DRBD_C_FILL_TARGET_MIN 0
#define DRBD_C_FILL_TARGET_MAX (1<<20) /* 500MByte in sec */
#define DRBD_C_FILL_TARGET_DEF 0 /* By default disabled -> controlled by delay_target */
#define DRBD_C_FILL_TARGET_DEF 100 /* Try to place 50KiB in socket send buffer during resync */
#define DRBD_C_MAX_RATE_MIN 250 /* kByte/sec */
#define DRBD_C_MAX_RATE_MAX (4 << 20)
@ -167,7 +167,7 @@
#define DRBD_C_MIN_RATE_MIN 0 /* kByte/sec */
#define DRBD_C_MIN_RATE_MAX (4 << 20)
#define DRBD_C_MIN_RATE_DEF 4096
#define DRBD_C_MIN_RATE_DEF 250
#define DRBD_CONG_FILL_MIN 0
#define DRBD_CONG_FILL_MAX (10<<21) /* 10GByte in sectors */
@ -187,6 +187,6 @@
#define DRBD_ALLOW_TWO_PRIMARIES_DEF 0
#define DRBD_ALWAYS_ASBP_DEF 0
#define DRBD_USE_RLE_DEF 0
#define DRBD_USE_RLE_DEF 1
#endif