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Chaoguang Lin 2022-04-18 17:59:28 -07:00
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documentation/sphinx/source/special-keys.rst
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@ -191,7 +191,7 @@ that process, and wait for necessary data to be moved away.
#. ``\xff\xff/management/options/excluded/force`` Read/write. Setting this key disables safety checks for writes to ``\xff\xff/management/excluded/<exclusion>``. Setting this key only has an effect in the current transaction and is not persisted on commit. #. ``\xff\xff/management/options/excluded/force`` Read/write. Setting this key disables safety checks for writes to ``\xff\xff/management/excluded/<exclusion>``. Setting this key only has an effect in the current transaction and is not persisted on commit.
#. ``\xff\xff/management/options/failed/force`` Read/write. Setting this key disables safety checks for writes to ``\xff\xff/management/failed/<exclusion>``. Setting this key only has an effect in the current transaction and is not persisted on commit. #. ``\xff\xff/management/options/failed/force`` Read/write. Setting this key disables safety checks for writes to ``\xff\xff/management/failed/<exclusion>``. Setting this key only has an effect in the current transaction and is not persisted on commit.
#. ``\xff\xff/management/min_required_commit_version`` Read/write. Changing this key will change the corresponding system key ``\xff/minRequiredCommitVersion = [[Version]]``. The value of this special key is the literal text of the underlying ``Version``, which is ``int64_t``. If you set the key with a value failed to be parsed as ``int64_t``, ``special_keys_api_failure`` will be thrown. In addition, the given ``Version`` should be larger than the current read version and smaller than the upper bound(``2**63-1-version_per_second*3600*24*365*1000``). Otherwise, ``special_keys_api_failure`` is thrown. For more details, see help text of ``fdbcli`` command ``advanceversion``. #. ``\xff\xff/management/min_required_commit_version`` Read/write. Changing this key will change the corresponding system key ``\xff/minRequiredCommitVersion = [[Version]]``. The value of this special key is the literal text of the underlying ``Version``, which is ``int64_t``. If you set the key with a value failed to be parsed as ``int64_t``, ``special_keys_api_failure`` will be thrown. In addition, the given ``Version`` should be larger than the current read version and smaller than the upper bound(``2**63-1-version_per_second*3600*24*365*1000``). Otherwise, ``special_keys_api_failure`` is thrown. For more details, see help text of ``fdbcli`` command ``advanceversion``.
#. ``\xff\xff/management/profiling/<client_txn_sample_rate|client_txn_size_limit>`` (removed in 7.2) Read/write. Changing these two keys will change the corresponding system keys ``\xff\x02/fdbClientInfo/<client_txn_sample_rate|client_txn_size_limit>``, respectively. The value of ``\xff\xff/management/client_txn_sample_rate`` is a literal text of ``double``, and the value of ``\xff\xff/management/client_txn_size_limit`` is a literal text of ``int64_t``. A special value ``default`` can be set to or read from these two keys, representing the client profiling is disabled. In addition, ``clear`` in this range is not allowed. For more details, see help text of ``fdbcli`` command ``profile client``. #. ``\xff\xff/management/profiling/<client_txn_sample_rate|client_txn_size_limit>`` (deprecated after 7.2) Read/write. Changing these two keys will change the corresponding system keys ``\xff\x02/fdbClientInfo/<client_txn_sample_rate|client_txn_size_limit>``, respectively. The value of ``\xff\xff/management/client_txn_sample_rate`` is a literal text of ``double``, and the value of ``\xff\xff/management/client_txn_size_limit`` is a literal text of ``int64_t``. A special value ``default`` can be set to or read from these two keys, representing the client profiling is disabled. In addition, ``clear`` in this range is not allowed. For more details, see help text of ``fdbcli`` command ``profile client``.
#. ``\xff\xff/management/maintenance/<zone_id> := <seconds>`` Read/write. Set/clear a key in this range will change the corresponding system key ``\xff\x02/healthyZone``. The value is a literal text of a non-negative ``double`` which represents the remaining time for the zone to be in maintenance. Commiting with an invalid value will throw ``special_keys_api_failure``. Only one zone is allowed to be in maintenance at the same time. Setting a new key in the range will override the old one and the transaction will throw ``special_keys_api_failure`` error if more than one zone is given. For more details, see help text of ``fdbcli`` command ``maintenance``. #. ``\xff\xff/management/maintenance/<zone_id> := <seconds>`` Read/write. Set/clear a key in this range will change the corresponding system key ``\xff\x02/healthyZone``. The value is a literal text of a non-negative ``double`` which represents the remaining time for the zone to be in maintenance. Commiting with an invalid value will throw ``special_keys_api_failure``. Only one zone is allowed to be in maintenance at the same time. Setting a new key in the range will override the old one and the transaction will throw ``special_keys_api_failure`` error if more than one zone is given. For more details, see help text of ``fdbcli`` command ``maintenance``.
In addition, a special key ``\xff\xff/management/maintenance/IgnoreSSFailures`` in the range, if set, will disable datadistribution for storage server failures. In addition, a special key ``\xff\xff/management/maintenance/IgnoreSSFailures`` in the range, if set, will disable datadistribution for storage server failures.
It is doing the same thing as the fdbcli command ``datadistribution disable ssfailure``. It is doing the same thing as the fdbcli command ``datadistribution disable ssfailure``.

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fdbclient/SpecialKeySpace.actor.h
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@ -485,7 +485,7 @@ public:
Future<Optional<std::string>> commit(ReadYourWritesTransaction* ryw) override; Future<Optional<std::string>> commit(ReadYourWritesTransaction* ryw) override;
}; };
// Removed in 7.2 // Deprecated after 7.2
class ClientProfilingImpl : public SpecialKeyRangeRWImpl { class ClientProfilingImpl : public SpecialKeyRangeRWImpl {
public: public:
explicit ClientProfilingImpl(KeyRangeRef kr); explicit ClientProfilingImpl(KeyRangeRef kr);