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-rw-r--r--xlators/mgmt/glusterd/src/glusterd-volume-set.c6
-rw-r--r--xlators/performance/md-cache/src/md-cache.c54
2 files changed, 50 insertions, 10 deletions
diff --git a/xlators/mgmt/glusterd/src/glusterd-volume-set.c b/xlators/mgmt/glusterd/src/glusterd-volume-set.c
index 7340fa07fca..46eda9379ac 100644
--- a/xlators/mgmt/glusterd/src/glusterd-volume-set.c
+++ b/xlators/mgmt/glusterd/src/glusterd-volume-set.c
@@ -1795,6 +1795,12 @@ struct volopt_map_entry glusterd_volopt_map[] = {
.op_version = GD_OP_VERSION_3_9_0,
.flags = VOLOPT_FLAG_CLIENT_OPT},
+ {.key = "performance.global-cache-invalidation",
+ .voltype = "performance/md-cache",
+ .option = "global-cache-invalidation",
+ .op_version = GD_OP_VERSION_7_0,
+ .flags = VOLOPT_FLAG_CLIENT_OPT},
+
/* Feature translators */
{.key = "features.uss",
.voltype = "features/snapview-server",
diff --git a/xlators/performance/md-cache/src/md-cache.c b/xlators/performance/md-cache/src/md-cache.c
index ff5c8c2f914..a2d280e3290 100644
--- a/xlators/performance/md-cache/src/md-cache.c
+++ b/xlators/performance/md-cache/src/md-cache.c
@@ -71,6 +71,8 @@ struct mdc_conf {
gf_boolean_t cache_swift_metadata;
gf_boolean_t cache_samba_metadata;
gf_boolean_t mdc_invalidation;
+ gf_boolean_t global_invalidation;
+
time_t last_child_down;
gf_lock_t lock;
struct mdc_statistics mdc_counter;
@@ -470,6 +472,7 @@ mdc_inode_iatt_set_validate(xlator_t *this, inode_t *inode, struct iatt *prebuf,
uint32_t rollover = 0;
uint64_t gen = 0;
gf_boolean_t update_xa_time = _gf_false;
+ struct mdc_conf *conf = this->private;
mdc = mdc_inode_prep(this, inode);
if (!mdc) {
@@ -533,18 +536,20 @@ mdc_inode_iatt_set_validate(xlator_t *this, inode_t *inode, struct iatt *prebuf,
(iatt->ia_mtime_nsec != mdc->md_mtime_nsec) ||
(iatt->ia_ctime != mdc->md_ctime) ||
(iatt->ia_ctime_nsec != mdc->md_ctime_nsec)) {
- if (!prebuf || (prebuf->ia_ctime != mdc->md_ctime) ||
- (prebuf->ia_ctime_nsec != mdc->md_ctime_nsec) ||
- (prebuf->ia_mtime != mdc->md_mtime) ||
- (prebuf->ia_mtime_nsec != mdc->md_mtime_nsec)) {
- gf_msg_trace("md-cache", 0,
- "prebuf doesn't "
- "match the value we have cached,"
- " invalidate the inode(%s)",
- uuid_utoa(inode->gfid));
+ if (conf->global_invalidation &&
+ (!prebuf || (prebuf->ia_mtime != mdc->md_mtime) ||
+ (prebuf->ia_mtime_nsec != mdc->md_mtime_nsec) ||
+ (prebuf->ia_ctime != mdc->md_ctime) ||
+ (prebuf->ia_ctime_nsec != mdc->md_ctime_nsec))) {
+ if (IA_ISREG(inode->ia_type)) {
+ gf_msg("md-cache", GF_LOG_TRACE, 0,
+ MD_CACHE_MSG_DISCARD_UPDATE,
+ "prebuf doesn't match the value we have cached,"
+ " invalidate the inode(%s)",
+ uuid_utoa(inode->gfid));
- if (IA_ISREG(inode->ia_type))
inode_invalidate(inode);
+ }
} else {
update_xa_time = _gf_true;
}
@@ -3551,6 +3556,9 @@ mdc_reconfigure(xlator_t *this, dict_t *options)
GF_OPTION_RECONF("cache-invalidation", conf->mdc_invalidation, options,
bool, out);
+ GF_OPTION_RECONF("global-cache-invalidation", conf->global_invalidation,
+ options, bool, out);
+
GF_OPTION_RECONF("pass-through", this->pass_through, options, bool, out);
GF_OPTION_RECONF("md-cache-statfs", conf->cache_statfs, options, bool, out);
@@ -3622,6 +3630,9 @@ mdc_init(xlator_t *this)
GF_OPTION_INIT("cache-invalidation", conf->mdc_invalidation, bool, out);
+ GF_OPTION_INIT("global-cache-invalidation", conf->global_invalidation, bool,
+ out);
+
GF_OPTION_INIT("pass-through", this->pass_through, bool, out);
pthread_mutex_init(&conf->statfs_cache.lock, NULL);
@@ -3859,6 +3870,29 @@ struct volume_options mdc_options[] = {
" on receiving the cache-invalidation notifications",
},
{
+ .key = {"global-cache-invalidation"},
+ .type = GF_OPTION_TYPE_BOOL,
+ .default_value = "true",
+ .op_version = {GD_OP_VERSION_7_0},
+ .flags = OPT_FLAG_SETTABLE | OPT_FLAG_CLIENT_OPT | OPT_FLAG_DOC,
+ .description =
+ "When \"on\", purges all read caches in kernel and glusterfs stack "
+ "whenever a stat change is detected. Stat changes can be detected "
+ "while processing responses to file operations (fop) or through "
+ "upcall notifications. Since purging caches can be an expensive "
+ "operation, it's advised to have this option \"on\" only when a "
+ "file "
+ "can be accessed from multiple different Glusterfs mounts and "
+ "caches across these different mounts are required to be coherent. "
+ "If a file is not accessed across different mounts "
+ "(simple example is having only one mount for a volume), its "
+ "advised to keep "
+ "this option \"off\" as all file modifications go through caches "
+ "keeping them "
+ "coherent. This option overrides value of "
+ "performance.cache-invalidation.",
+ },
+ {
.key = {"md-cache-statfs"},
.type = GF_OPTION_TYPE_BOOL,
.default_value = "off",