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authorGeorge Amanakis <[email protected]>2020-04-10 13:33:35 -0400
committerGitHub <[email protected]>2020-04-10 10:33:35 -0700
commit77f6826b83b7e27f0996f6d192202c36f65e41fd (patch)
treeb9946c99348bf6742cc41739aeff1a2b952d9d2f /include/sys/fs
parent36a6e2335c45212f2609269bcee3004908ac6bcb (diff)
Persistent L2ARC
This commit makes the L2ARC persistent across reboots. We implement a light-weight persistent L2ARC metadata structure that allows L2ARC contents to be recovered after a reboot. This significantly eases the impact a reboot has on read performance on systems with large caches. Reviewed-by: Matthew Ahrens <[email protected]> Reviewed-by: George Wilson <[email protected]> Reviewed-by: Ryan Moeller <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Co-authored-by: Saso Kiselkov <[email protected]> Co-authored-by: Jorgen Lundman <[email protected]> Co-authored-by: George Amanakis <[email protected]> Ported-by: Yuxuan Shui <[email protected]> Signed-off-by: George Amanakis <[email protected]> Closes #925 Closes #1823 Closes #2672 Closes #3744 Closes #9582
Diffstat (limited to 'include/sys/fs')
-rw-r--r--include/sys/fs/zfs.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/sys/fs/zfs.h b/include/sys/fs/zfs.h
index 477356aa7..f5aced0da 100644
--- a/include/sys/fs/zfs.h
+++ b/include/sys/fs/zfs.h
@@ -573,6 +573,11 @@ typedef enum zfs_key_location {
#define ZPL_VERSION_USERSPACE ZPL_VERSION_4
#define ZPL_VERSION_SA ZPL_VERSION_5
+/* Persistent L2ARC version */
+#define L2ARC_PERSISTENT_VERSION_1 1ULL
+#define L2ARC_PERSISTENT_VERSION L2ARC_PERSISTENT_VERSION_1
+#define L2ARC_PERSISTENT_VERSION_STRING "1"
+
/* Rewind policy information */
#define ZPOOL_NO_REWIND 1 /* No policy - default behavior */
#define ZPOOL_NEVER_REWIND 2 /* Do not search for best txg or rewind */