libvirt_domain_block_stats — provide block device statistics for the block device on domain.
This function returns block device (disk) stats for block devices attached to the domain. The path parameter is the name of the block device. Domains may have more than one block device. To get stats for each you should make multiple calls to this function. Individual fields within the stats structure may be returned as -1, which indicates that the hypervisor does not support that particular statistic.
The returned array contains members in accoridng to the libvirt structure virDomainBlockStatsStruct.
|rd_req||number of read requests|
|rd_bytes||number of read bytes|
|wr_req||number of write requests|
|wr_bytes||number of written bytes|
|errs||In Xen this returns the mysterious 'oo_req'.|
This is the first implementation of this function in phplibvirt. There are some unsolved issues regarding integer ranges between PHP and Libvirt. We may change the beahviour of this function in future.
Domain resource of domain the block device is attached to
Path to the block device, i.e. "hda"
Array with statistics.
Example #1 libvirt_domain_block_stats() example
Get interface statistics on blockdevice hda on domain test
The above example will output something similar to:
Array ( [rd_req] => 0 [rd_bytes] => 0 [wr_req] => 0 [wr_bytes] => 0 [errs] => -1 )