diff options
author | Philipp Reisner <philipp.reisner@linbit.com> | 2011-11-11 06:31:20 -0500 |
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committer | Philipp Reisner <philipp.reisner@linbit.com> | 2012-11-08 10:58:10 -0500 |
commit | 380207d08e7c4d1b19c0323777278992b4fbf9d6 (patch) | |
tree | 3a35f3543810eb2a7d87f15dd62a8fe8e13aad76 /include/linux/drbd.h | |
parent | d10b4ea32bf2b77a3d56a20992cd549978df7b38 (diff) |
drbd: Load balancing of read requests
New config option for the disk secition "read-balancing", with
the values: prefer-local, prefer-remote, round-robin, when-congested-remote.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Diffstat (limited to 'include/linux/drbd.h')
-rw-r--r-- | include/linux/drbd.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/drbd.h b/include/linux/drbd.h index 1e9f754b66ac..157ba3d74dc7 100644 --- a/include/linux/drbd.h +++ b/include/linux/drbd.h | |||
@@ -102,6 +102,14 @@ enum drbd_on_congestion { | |||
102 | OC_DISCONNECT, | 102 | OC_DISCONNECT, |
103 | }; | 103 | }; |
104 | 104 | ||
105 | enum drbd_read_balancing { | ||
106 | RB_PREFER_LOCAL, | ||
107 | RB_PREFER_REMOTE, | ||
108 | RB_ROUND_ROBIN, | ||
109 | RB_LEAST_PENDING, | ||
110 | RB_CONGESTED_REMOTE, | ||
111 | }; | ||
112 | |||
105 | /* KEEP the order, do not delete or insert. Only append. */ | 113 | /* KEEP the order, do not delete or insert. Only append. */ |
106 | enum drbd_ret_code { | 114 | enum drbd_ret_code { |
107 | ERR_CODE_BASE = 100, | 115 | ERR_CODE_BASE = 100, |