NAME

SYNOPSIS

#include <libpmempool.h>
int pmempool_feature_query(const char *path, enum pmempool_feature feature, unsigned flags);
int pmempool_feature_enable(const char *path, enum pmempool_feature feature, unsigned flags);
int pmempool_feature_disable(const char *path, enum pmempool_feature feature, unsigned flags);

    

DESCRIPTION

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PMEMPOOL_FEAT_SINGLEHDR - only the first part in each replica contains the pool part internal metadata. This value can be used only with pmempool_feature_query(). It can not be enabled or disabled. For details see poolset(5).

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PMEMPOOL_FEAT_CKSUM_2K - only the first 2KiB of pool part internal metadata is checksummed. Other features may depend on this one to store additional metadata in otherwise unused second 2KiB part of a header. When PMEMPOOL_FEAT_CKSUM_2K is disabled whole 4KiB is checksummed.

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PMEMPOOL_FEAT_SHUTDOWN_STATE - enables additional check performed during pool open which verifies pool consistency in the presence of dirty shutdown. PMEMPOOL_FEAT_CKSUM_2K has to be enabled prior to PMEMPOOL_FEAT_SHUTDOWN_STATE otherwise enabling PMEMPOOL_FEAT_SHUTDOWN_STATE will fail.

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PMEMPOOL_FEAT_CHECK_BAD_BLOCKS - enables checking bad blocks performed during opening a pool and fixing bad blocks performed by pmempool-sync during syncing a pool. For details see pmempool-feature(1).

The pmempool_feature_query() function checks state of feature in the pool set pointed by path.

The pmempool_feature_enable() function enables feature in the pool set pointed by path.

The pmempool_feature_disable() function disables feature in the pool set pointed by path.

COMPATIBILITY

DISCLAIMER

RETURN VALUE

On success, pmempool_feature_enable() returns 0. On error, it returns -1 and sets errno accordingly.

On success, pmempool_feature_disable() returns 0. On error, it returns -1 and sets errno accordingly.

If path points poolset with remote replica errno is set to EINVAL and function returns -1.

If non zero flags are provided errno is set to EINVAL and function returns -1.

SEE ALSO