channel semantics (Send/Recv) for the
InfiniBand, RoCE and iWARP protocols.
- falloc Perform fallocate/punch_hole to files
-
+ falloc IO engine that does regular fallocate to
+ simulate data transfer as fio ioengine.
+ DDIR_READ does fallocate(,mode = keep_size,)
+ DDIR_WRITE does fallocate(,mode = 0)
+ DDIR_TRIM does fallocate(,mode = punch_hole)
+
+ e4defrag IO engine that does regular EXT4_IOC_MOVE_EXT
+ ioctls to simulate defragment activity in
+ request to DDIR_WRITE event
+
external Prefix to specify loading an external
IO engine object file. Append the engine
filename, eg ioengine=external:/tmp/foo.o
[net] listen For TCP network connections, tell fio to listen for incoming
connections rather than initiating an outgoing connection. The
hostname must be omitted if this option is used.
+[e4defrag] donorname=str
+ File will be used as a block donor(swap extents between files)
+[e4defrag] inplace=int
+ Configure donor file blocks allocation strategy
+ 0(default): Preallocate donor's file on init
+ 1 : allocate space immidietly inside defragment event,
+ and free right after event
+
6.0 Interpreting the output
[global]
-
-direct=0
-buffered=0
+ioengine=e4defrag
directory=/scratch
-
nrfiles=1
+filesize=100M
+size=100M
+bs=32k
+#group_reporting
-filesize=4G
-fadvise_hint=0
-
-group_reporting
+[isolated-e4defrag]
+# It is important to disable buffered io
+buffered=0
+donorname=file.def
+filename=file1
+inplace=0
+rw=write
-[defrag-fuzzer-8k]
+# Run e4defrag and aio-dio workers in parallel
+[e4defrag]
+stonewall
+time_based=30
+runtime=30
ioengine=e4defrag
-iodepth=1
-size=1G
-bs=8k
+buffered=0
donorname=file.def
-filename=file
+filename=file1
inplace=0
-rw=randwrite
-numjobs=1
+rw=write
[random-aio-32k]
ioengine=libaio
+runtime=30
+verify=md5
+direct=1
+bs=64k
iodepth=128
-bs=32k
-size=4G
-filename=file
-rw=randwrite
-numjobs=1
+filename=file1
+rw=randrw
+numjobs=4
+
+
--- /dev/null
+#################################################
+# Hardcode defragmentation patterns
+# Please be carefull, it can trigger kernel panic
+#################################################
+[global]
+ioengine=e4defrag
+group_reporting
+directory=/scratch
+nrfiles=1
+filesize=100M
+size=100M
+donorname=file.def
+bs=32k
+
+###########
+# Run several defragmentation threads for different files, but
+# use shared donor file
+[parallel-e4defrag]
+buffered=0
+inplace=0
+rw=write
+numjobs=4
+
+########
+# Run two defragmentation threads, each thread use another's file
+# as donor file
+
+[e4defrag-1]
+stonewall
+inplace=0
+rw=write
+donorname=e4defrag-2
+
+[e4defrag-2]
+inplace=0
+rw=write
+donorname=e4defrag-1
+
+###########
+# Run random defragment activity
+[e4defrag-fuzzer-4k]
+stonewall
+inplace=1
+bs=4k
+rw=randwrite
+filename=file
+donorname=file.def
+
+########
+# Run random e4defrag and various aio workers in parallel
+[e4defrag-fuzzer-4k]
+stonewall
+continue_on_error=all
+inplace=1
+bs=4k
+donorname=file3.def
+filename=file3
+time_based=30
+rw=randwrite
+
+[buffered-aio-32k]
+continue_on_error=none
+verify=md5
+buffered=1
+ioengine=libaio
+iodepth=128
+bs=32k
+filename=file3
+rw=randrw
+runtime=30
+time_based=30
+numjobs=4
+
+[direct-aio-32k]
+continue_on_error=none
+verify=md5
+buffered=0
+direct=1
+ioengine=libaio
+iodepth=128
+bs=32k
+filename=file3
+rw=randrw
+runtime=30
+time_based=30
+numjobs=4
+
+
--- /dev/null
+[global]
+ioengine=falloc
+iodepth=1
+direct=0
+buffered=0
+directory=/scratch
+nrfiles=1
+size=100M
+filesize=100M
+group_reporting
+
+
+# Run falloc and punch_hole threads in parallel
+# After activity file will be highly fragmented
+[falloc-fuzzer]
+stonewall
+runtime=10
+time_based=10
+bssplit=4k/10:64k/50:32k/40
+rw=randwrite
+numjobs=1
+filename=fragmented_file
+
+[punch hole-fuzzer]
+bs=4k
+runtime=10
+time_based=10
+rw=randtrim
+numjobs=2
+filename=fragmented_file
+
+## Mesure IO performance on fragmented file
+[sequential aio-dio write]
+stonewall
+ioengine=libaio
+numjobs=1
+iodepth=128
+buffered=0
+direct=1
+rw=write
+bs=64k
+filename=fragmented_file
+
+[sequential buffered read]
+stonewall
+ioengine=sync
+numjobs=1
+iodepth=1
+buffered=1
+direct=0
+rw=read
+bs=64k
+filename=fragmented_file
+
.B external
Loads an external I/O engine object file. Append the engine filename as
`:\fIenginepath\fR'.
+.TP
+.B falloc
+ IO engine that does regular linux native fallocate callt to simulate data
+transfer as fio ioengine
+.br
+ DDIR_READ does fallocate(,mode = FALLOC_FL_KEEP_SIZE,)
+.br
+ DIR_WRITE does fallocate(,mode = 0)
+.br
+ DDIR_TRIM does fallocate(,mode = FALLOC_FL_KEEP_SIZE|FALLOC_FL_PUNCH_HOLE)
+.TP
+.B e4defrag
+IO engine that does regular EXT4_IOC_MOVE_EXT ioctls to simulate defragment activity
+request to DDIR_WRITE event
+.TP
.RE
.RE
.TP
For TCP network connections, tell fio to listen for incoming
connections rather than initiating an outgoing connection. The
hostname must be omitted if this option is used.
+.TP
+.BI (e4defrag,donorname) \fR=\fPstr
+File will be used as a block donor (swap extents between files)
+.TP
+.BI (e4defrag,inplace) \fR=\fPint
+Configure donor file block allocation strategy
+.RS
+.BI 0(default) :
+Preallocate donor's file on init
+.TP
+.BI 1:
+allocate space immidietly inside defragment event, and free right after event
+.RE
+.TP
.SH OUTPUT
While running, \fBfio\fR will display the status of the created jobs. For
example:
projects / fio.git / commitdiff