Generic interface providing error code and quality-of-service constants for object stores. More...
Public Attributes | |
| const | ATTR_DURABILITY = 2 |
| Durability of writes; see QOS_DURABILITY_* (higher means stronger) | |
| const | ATTR_EMULATION = 1 |
| Emulation/fallback mode; see QOS_EMULATION_*; higher is better. | |
| const | ERR_NO_RESPONSE = 1 |
| Storage medium failed to yield a response. | |
| const | ERR_NONE = 0 |
| No storage medium error. | |
| const | ERR_UNEXPECTED = 3 |
| Storage medium operation failed due to usage limitations or an I/O error. | |
| const | ERR_UNREACHABLE = 2 |
| Storage medium could not be reached. | |
| const | QOS_DURABILITY_DISK = 4 |
| Data is saved to disk and writes do not usually block on fsync() | |
| const | QOS_DURABILITY_NONE = 1 |
| Data is never saved to begin with (blackhole store) | |
| const | QOS_DURABILITY_RDBMS = 5 |
| Data is saved to disk and writes usually block on fsync(), like a standard RDBMS. | |
| const | QOS_DURABILITY_SCRIPT = 2 |
| Data is lost at the end of the current web request or CLI script. | |
| const | QOS_DURABILITY_SERVICE = 3 |
| Data is lost once the service storing the data restarts. | |
| const | QOS_EMULATION_SQL = 1 |
| Fallback disk-based SQL store. | |
| const | QOS_UNKNOWN = INF |
| Generic "unknown" value; useful for comparisons (always "good enough") | |
Detailed Description
Generic interface providing error code and quality-of-service constants for object stores.
- Since
- 1.35
Definition at line 32 of file StorageAwareness.php.
Member Data Documentation
◆ ATTR_DURABILITY
| const Wikimedia\LightweightObjectStore\StorageAwareness::ATTR_DURABILITY = 2 |
Durability of writes; see QOS_DURABILITY_* (higher means stronger)
Definition at line 45 of file StorageAwareness.php.
Referenced by RedisBagOStuff\__construct(), RESTBagOStuff\__construct(), SqlBagOStuff\__construct(), MemcachedBagOStuff\__construct(), APCUBagOStuff\__construct(), and WinCacheBagOStuff\__construct().
◆ ATTR_EMULATION
| const Wikimedia\LightweightObjectStore\StorageAwareness::ATTR_EMULATION = 1 |
Emulation/fallback mode; see QOS_EMULATION_*; higher is better.
Definition at line 43 of file StorageAwareness.php.
Referenced by SqlBagOStuff\__construct().
◆ ERR_NO_RESPONSE
| const Wikimedia\LightweightObjectStore\StorageAwareness::ERR_NO_RESPONSE = 1 |
Storage medium failed to yield a response.
Definition at line 36 of file StorageAwareness.php.
Referenced by WANObjectCache\getLastError().
◆ ERR_NONE
| const Wikimedia\LightweightObjectStore\StorageAwareness::ERR_NONE = 0 |
No storage medium error.
Definition at line 34 of file StorageAwareness.php.
Referenced by WANObjectCache\checkAndSetCooloff(), MultiWriteBagOStuff\getLastError(), and WANObjectCache\getLastError().
◆ ERR_UNEXPECTED
| const Wikimedia\LightweightObjectStore\StorageAwareness::ERR_UNEXPECTED = 3 |
Storage medium operation failed due to usage limitations or an I/O error.
Definition at line 40 of file StorageAwareness.php.
Referenced by MemcachedPeclBagOStuff\checkResult(), RESTBagOStuff\handleError(), and RedisBagOStuff\handleException().
◆ ERR_UNREACHABLE
| const Wikimedia\LightweightObjectStore\StorageAwareness::ERR_UNREACHABLE = 2 |
Storage medium could not be reached.
Definition at line 38 of file StorageAwareness.php.
Referenced by RedisBagOStuff\getConnection(), and WANObjectCache\getLastError().
◆ QOS_DURABILITY_DISK
| const Wikimedia\LightweightObjectStore\StorageAwareness::QOS_DURABILITY_DISK = 4 |
Data is saved to disk and writes do not usually block on fsync()
Definition at line 57 of file StorageAwareness.php.
Referenced by RedisBagOStuff\__construct(), and RESTBagOStuff\__construct().
◆ QOS_DURABILITY_NONE
| const Wikimedia\LightweightObjectStore\StorageAwareness::QOS_DURABILITY_NONE = 1 |
Data is never saved to begin with (blackhole store)
Definition at line 51 of file StorageAwareness.php.
Referenced by APCUBagOStuff\__construct(), and WinCacheBagOStuff\__construct().
◆ QOS_DURABILITY_RDBMS
| const Wikimedia\LightweightObjectStore\StorageAwareness::QOS_DURABILITY_RDBMS = 5 |
Data is saved to disk and writes usually block on fsync(), like a standard RDBMS.
Definition at line 59 of file StorageAwareness.php.
Referenced by SqlBagOStuff\__construct().
◆ QOS_DURABILITY_SCRIPT
| const Wikimedia\LightweightObjectStore\StorageAwareness::QOS_DURABILITY_SCRIPT = 2 |
Data is lost at the end of the current web request or CLI script.
Definition at line 53 of file StorageAwareness.php.
Referenced by APCUBagOStuff\__construct(), and WinCacheBagOStuff\__construct().
◆ QOS_DURABILITY_SERVICE
| const Wikimedia\LightweightObjectStore\StorageAwareness::QOS_DURABILITY_SERVICE = 3 |
Data is lost once the service storing the data restarts.
Definition at line 55 of file StorageAwareness.php.
Referenced by MemcachedBagOStuff\__construct(), APCUBagOStuff\__construct(), and WinCacheBagOStuff\__construct().
◆ QOS_EMULATION_SQL
| const Wikimedia\LightweightObjectStore\StorageAwareness::QOS_EMULATION_SQL = 1 |
Fallback disk-based SQL store.
Definition at line 48 of file StorageAwareness.php.
Referenced by SqlBagOStuff\__construct().
◆ QOS_UNKNOWN
| const Wikimedia\LightweightObjectStore\StorageAwareness::QOS_UNKNOWN = INF |
Generic "unknown" value; useful for comparisons (always "good enough")
Definition at line 62 of file StorageAwareness.php.
The documentation for this interface was generated from the following file:
- includes/libs/objectcache/utils/StorageAwareness.php
