X-Git-Url: https://git.kernel.dk/?a=blobdiff_plain;f=HOWTO;h=6219da663417b6d053e1794b77406fa8f805cd33;hb=1487c122c651191b34d8f0b2ac1c6ee5cd343874;hp=52812cc7de37e7d5d95c34c45e757c8126643709;hpb=d16e84e256ffdcd3143c9439cf1e408d8db61c1a;p=fio.git

diff --git a/HOWTO b/HOWTO
index 52812cc7..6219da66 100644
--- a/HOWTO
+++ b/HOWTO
@@ -2067,6 +2067,9 @@ I/O engine
 			unless :option:`verify` is set or :option:`cuda_io` is `posix`.
 			:option:`iomem` must not be `cudamalloc`. This ioengine defines
 			engine specific options.
+		**dfs**
+			I/O engine supporting asynchronous read and write operations to the
+			DAOS File System (DFS) via libdfs.
 
 I/O engine specific parameters
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -2189,7 +2192,7 @@ with the caveat that when used on the command line, they must come after the
 		this will be the starting port number since fio will use a range of
 		ports.
 
-   [rdma]
+   [rdma], [librpma_*]
 
 		The port to use for RDMA-CM communication. This should be the same value
 		on the client and the server side.
@@ -2200,6 +2203,15 @@ with the caveat that when used on the command line, they must come after the
 	is a TCP listener or UDP reader, the hostname is not used and must be omitted
 	unless it is a valid UDP multicast address.
 
+.. option:: serverip=str : [librpma_*]
+
+	The IP address to be used for RDMA-CM based I/O.
+
+.. option:: direct_write_to_pmem=bool : [librpma_*]
+
+	Set to 1 only when Direct Write to PMem from the remote host is possible.
+	Otherwise, set to 0.
+
 .. option:: interface=str : [netsplice] [net]
 
 	The IP address of the network interface used to send or receive UDP
@@ -2452,6 +2464,24 @@ with the caveat that when used on the command line, they must come after the
 		GPU to RAM before a write and copied from RAM to GPU after a
 		read. :option:`verify` does not affect use of cudaMemcpy.
 
+.. option:: pool=str : [dfs]
+
+	Specify the UUID of the DAOS pool to connect to.
+
+.. option:: cont=str : [dfs]
+
+	Specify the UUID of the DAOS container to open.
+
+.. option:: chunk_size=int : [dfs]
+
+	Specificy a different chunk size (in bytes) for the dfs file.
+	Use DAOS container's chunk size by default.
+
+.. option:: object_class=str : [dfs]
+
+	Specificy a different object class for the dfs file.
+	Use DAOS container's object class by default.
+
 I/O depth
 ~~~~~~~~~
 
@@ -2663,11 +2693,12 @@ I/O latency
 	true, fio will continue running and try to meet :option:`latency_target`
 	by adjusting queue depth.
 
-.. option:: max_latency=time
+.. option:: max_latency=time[,time][,time]
 
 	If set, fio will exit the job with an ETIMEDOUT error if it exceeds this
 	maximum latency. When the unit is omitted, the value is interpreted in
-	microseconds.
+	microseconds. Comma-separated values may be specified for reads, writes,
+	and trims as described in :option:`blocksize`.
 
 .. option:: rate_cycle=int