diff options
Diffstat (limited to 'src/mongo/s/d_merge.h')
| -rw-r--r-- | src/mongo/s/d_merge.h | 50 |
1 files changed, 25 insertions, 25 deletions
diff --git a/src/mongo/s/d_merge.h b/src/mongo/s/d_merge.h index 85d39fa7f11..79fa37a2dbb 100644 --- a/src/mongo/s/d_merge.h +++ b/src/mongo/s/d_merge.h @@ -33,30 +33,30 @@ namespace mongo { - class OperationContext; +class OperationContext; - /** - * Merges a chunks in the specified [minKey, maxKey) range of the specified namespace. - * Updates the local and remote metadata by expanding the bounds of the first chunk in the - * range, dropping the others, and incrementing the minor version of the shard to the next - * higher version. Returns true on success. - * - * Fails with errMsg if the 'epoch' was set and has changed (indicating the range is no longer - * valid), or if the range does not exactly start and stop on chunks owned by this shard, or - * if the chunks in this range are not contiguous. - * - * WARNING: On network failure, it is possible that the chunks in our local metadata may not - * match the remote metadata, however the key ranges protected will be the same. All metadata - * operations are responsible for updating the metadata before performing any actions. - * - * Locking note: - * + Takes a distributed lock over the namespace - * + Cannot be called with any other locks held - */ - bool mergeChunks( OperationContext* txn, - const NamespaceString& nss, - const BSONObj& minKey, - const BSONObj& maxKey, - const OID& epoch, - std::string* errMsg ); +/** + * Merges a chunks in the specified [minKey, maxKey) range of the specified namespace. + * Updates the local and remote metadata by expanding the bounds of the first chunk in the + * range, dropping the others, and incrementing the minor version of the shard to the next + * higher version. Returns true on success. + * + * Fails with errMsg if the 'epoch' was set and has changed (indicating the range is no longer + * valid), or if the range does not exactly start and stop on chunks owned by this shard, or + * if the chunks in this range are not contiguous. + * + * WARNING: On network failure, it is possible that the chunks in our local metadata may not + * match the remote metadata, however the key ranges protected will be the same. All metadata + * operations are responsible for updating the metadata before performing any actions. + * + * Locking note: + * + Takes a distributed lock over the namespace + * + Cannot be called with any other locks held + */ +bool mergeChunks(OperationContext* txn, + const NamespaceString& nss, + const BSONObj& minKey, + const BSONObj& maxKey, + const OID& epoch, + std::string* errMsg); } |