Force a full status dump of cumulative (from job start) values at `time`
intervals. This option does *not* provide per-period measurements. So
values such as bandwidth are running averages. When the time unit is omitted,
- `time` is interpreted in seconds.
+ `time` is interpreted in seconds. Note that using this option with
+ ``--output-format=json`` will yield output that technically isn't valid
+ json, since the output will be collated sets of valid json. It will need
+ to be split into valid sets of json after the run.
.. option:: --section=name
Unlink job files after each iteration or loop. Default: false.
-.. option:: zonesize=int
+.. option:: zonemode=str
+
+ Accepted values are:
- Divide a file into zones of the specified size. See :option:`zoneskip`.
+ **none**
+ The :option:`zonerange`, :option:`zonesize` and
+ :option:`zoneskip` parameters are ignored.
+ **strided**
+ I/O happens in a single zone until
+ :option:`zonesize` bytes have been transferred.
+ After that number of bytes has been
+ transferred processing of the next zone
+ starts.
+ **zbd**
+ Zoned block device mode. I/O happens
+ sequentially in each zone, even if random I/O
+ has been selected. Random I/O happens across
+ all zones instead of being restricted to a
+ single zone. The :option:`zoneskip` parameter
+ is ignored. :option:`zonerange` and
+ :option:`zonesize` must be identical.
.. option:: zonerange=int
- Give size of an I/O zone. See :option:`zoneskip`.
+ Size of a single zone. See also :option:`zonesize` and
+ :option:`zoneskip`.
+
+.. option:: zonesize=int
+
+ For :option:`zonemode` =strided, this is the number of bytes to
+ transfer before skipping :option:`zoneskip` bytes. If this parameter
+ is smaller than :option:`zonerange` then only a fraction of each zone
+ with :option:`zonerange` bytes will be accessed. If this parameter is
+ larger than :option:`zonerange` then each zone will be accessed
+ multiple times before skipping to the next zone.
+
+ For :option:`zonemode` =zbd, this is the size of a single zone. The
+ :option:`zonerange` parameter is ignored in this mode.
.. option:: zoneskip=int
- Skip the specified number of bytes when :option:`zonesize` data has been
- read. The two zone options can be used to only do I/O on zones of a file.
+ For :option:`zonemode` =strided, the number of bytes to skip after
+ :option:`zonesize` bytes of data have been transferred. This parameter
+ must be zero for :option:`zonemode` =zbd.
+
+.. option:: read_beyond_wp=bool
+
+ This parameter applies to :option:`zonemode` =zbd only.
+
+ Zoned block devices are block devices that consist of multiple zones.
+ Each zone has a type, e.g. conventional or sequential. A conventional
+ zone can be written at any offset that is a multiple of the block
+ size. Sequential zones must be written sequentially. The position at
+ which a write must occur is called the write pointer. A zoned block
+ device can be either drive managed, host managed or host aware. For
+ host managed devices the host must ensure that writes happen
+ sequentially. Fio recognizes host managed devices and serializes
+ writes to sequential zones for these devices.
+
+ If a read occurs in a sequential zone beyond the write pointer then
+ the zoned block device will complete the read without reading any data
+ from the storage medium. Since such reads lead to unrealistically high
+ bandwidth and IOPS numbers fio only reads beyond the write pointer if
+ explicitly told to do so. Default: false.
+
+.. option:: max_open_zones=int
+
+ When running a random write test across an entire drive many more
+ zones will be open than in a typical application workload. Hence this
+ command line option that allows to limit the number of open zones. The
+ number of open zones is defined as the number of zones to which write
+ commands are issued.
+
+.. option:: zone_reset_threshold=float
+
+ A number between zero and one that indicates the ratio of logical
+ blocks with data to the total number of logical blocks in the test
+ above which zones should be reset periodically.
+
+.. option:: zone_reset_frequency=float
+
+ A number between zero and one that indicates how often a zone reset
+ should be issued if the zone reset threshold has been exceeded. A zone
+ reset is submitted after each (1 / zone_reset_frequency) write
+ requests. This and the previous parameter can be used to simulate
+ garbage collection activity.
I/O type
(RBD) via librbd without the need to use the kernel rbd driver. This
ioengine defines engine specific options.
+ **http**
+ I/O engine supporting GET/PUT requests over HTTP(S) with libcurl to
+ a WebDAV or S3 endpoint. This ioengine defines engine specific options.
+
+ This engine only supports direct IO of iodepth=1; you need to scale this
+ via numjobs. blocksize defines the size of the objects to be created.
+
+ TRIM is translated to object deletion.
+
**gfapi**
Using GlusterFS libgfapi sync interface to direct access to
GlusterFS volumes without having to go through FUSE. This ioengine
mounted with DAX on a persistent memory device through the PMDK
libpmem library.
+ **ime_psync**
+ Synchronous read and write using DDN's Infinite Memory Engine (IME).
+ This engine is very basic and issues calls to IME whenever an IO is
+ queued.
+
+ **ime_psyncv**
+ Synchronous read and write using DDN's Infinite Memory Engine (IME).
+ This engine uses iovecs and will try to stack as much IOs as possible
+ (if the IOs are "contiguous" and the IO depth is not exceeded)
+ before issuing a call to IME.
+
+ **ime_aio**
+ Asynchronous read and write using DDN's Infinite Memory Engine (IME).
+ This engine will try to stack as much IOs as possible by creating
+ requests for IME. FIO will then decide when to commit these requests.
+
I/O engine specific parameters
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
transferred to the device. The writefua option is ignored with this
selection.
+.. option:: http_host=str : [http]
+
+ Hostname to connect to. For S3, this could be the bucket hostname.
+ Default is **localhost**
+
+.. option:: http_user=str : [http]
+
+ Username for HTTP authentication.
+
+.. option:: http_pass=str : [http]
+
+ Password for HTTP authentication.
+
+.. option:: https=str : [http]
+
+ Enable HTTPS instead of http. *on* enables HTTPS; *insecure*
+ will enable HTTPS, but disable SSL peer verification (use with
+ caution!). Default is **off**
+
+.. option:: http_mode=str : [http]
+
+ Which HTTP access mode to use: *webdav*, *swift*, or *s3*.
+ Default is **webdav**
+
+.. option:: http_s3_region=str : [http]
+
+ The S3 region/zone string.
+ Default is **us-east-1**
+
+.. option:: http_s3_key=str : [http]
+
+ The S3 secret key.
+
+.. option:: http_s3_keyid=str : [http]
+
+ The S3 key/access id.
+
+.. option:: http_swift_auth_token=str : [http]
+
+ The Swift auth token. See the example configuration file on how
+ to retrieve this.
+
+.. option:: http_verbose=int : [http]
+
+ Enable verbose requests from libcurl. Useful for debugging. 1
+ turns on verbose logging from libcurl, 2 additionally enables
+ HTTP IO tracing. Default is **0**
+
I/O depth
~~~~~~~~~
:manpage:`blktrace(8)` for how to capture such logging data. For blktrace
replay, the file needs to be turned into a blkparse binary data file first
(``blkparse <device> -o /dev/null -d file_for_fio.bin``).
+ You can specify a number of files by separating the names with a ':'
+ character. See the :option:`filename` option for information on how to
+ escape ':' and '\' characters within the file names. These files will
+ be sequentially assigned to job clones created by :option:`numjobs`.
.. option:: read_iolog_chunked=bool
projects / fio.git / blobdiff