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authorDan Lambright <dlambrig@redhat.com>2015-02-22 11:05:58 -0500
committerVijay Bellur <vbellur@redhat.com>2015-03-21 09:50:29 -0700
commit20355992e8eed7d3ed78a23bc7e922d6ae94860d (patch)
treec7af71245b57d867ef83edf91dbfe69e622a478d /libglusterfs/src/dict.h
parent8aa13c8e285ad496ed7c8511ae0b735eed73ebd4 (diff)
cluster/dht: Add tier translator.
The tier translator shares most of DHT's code. It differs in how subvolumes are chosen for I/Os, and how file migration (cache promotion and demotion) is managed. That different functionality is split to either DHT or tier logic according to the "tier_methods" structure. A cache promotion and demotion thread is created in a manner similar to the rebalance daemon. The thread operates a timing wheel which periodically checks for promotion and demotion candidates (files). Candidates are queued and then migrated. Candidates must exist on the same node as the daemon and meet other critera per caching policies. This patch has two authors (Dan Lambright and Joseph Fernandes). Dan did the DHT changes and Joe wrote the cache policies. The fix depends on DHT readidr changes and the database library which have been submitted separately. Header files in libglusterfs/src/gfdb should be reviewed in patch 9683. For more background and design see the feature page [1]. [1] http://www.gluster.org/community/documentation/index.php/Features/data-classification Change-Id: Icc26c517ccecf5c42aef039f5b9c6f7afe83e46c BUG: 1194753 Signed-off-by: Dan Lambright <dlambrig@redhat.com> Reviewed-on: http://review.gluster.org/9724 Reviewed-by: Vijay Bellur <vbellur@redhat.com> Tested-by: Vijay Bellur <vbellur@redhat.com>
Diffstat (limited to 'libglusterfs/src/dict.h')
-rw-r--r--libglusterfs/src/dict.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/libglusterfs/src/dict.h b/libglusterfs/src/dict.h
index a4c1815d06a..a1a4c85f711 100644
--- a/libglusterfs/src/dict.h
+++ b/libglusterfs/src/dict.h
@@ -244,6 +244,7 @@ GF_MUST_CHECK int dict_set_str (dict_t *this, char *key, char *str);
GF_MUST_CHECK int dict_set_dynmstr (dict_t *this, char *key, char *str);
GF_MUST_CHECK int dict_set_dynstr (dict_t *this, char *key, char *str);
GF_MUST_CHECK int dict_set_dynstr_with_alloc (dict_t *this, char *key, const char *str);
+GF_MUST_CHECK int dict_add_dynstr_with_alloc (dict_t *this, char *key, char *str);
GF_MUST_CHECK int dict_get_str (dict_t *this, char *key, char **str);
GF_MUST_CHECK int dict_get_str_boolean (dict_t *this, char *key, int default_val);