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== Orion ==

[http://www.oracle.com/technetwork/topics/index-089595.html Oracle ORION Downloads]

:"ORION (Oracle I/O Calibration Tool) is a standalone tool for calibrating the I/O performance for storage systems that are intended to be used for Oracle databases. The calibration results are useful for understanding the performance capabilities of a storage system, either to uncover issues that would impact the performance of an Oracle database or to size a new database installation. Since ORION is a standalone tool, the user is not required to create and run an Oracle database.

:With the goal of closely mimicing the Oracle database, ORION generates a synthetic I/O workload, using the same I/O software stack as Oracle. ORION can be configured to generate a wide range of I/O workloads, including ones that simulate OLTP and data warehouse workloads.

:ORION is available for many platforms. Support for additional platforms will be added in the future. The User's Guide provides detailed usage documentation, including a "getting started" section and trouble-shooting tips. A summary of how to use ORION is also available directly from ORION by invoking the "-help" option.

:Please note that ORION is not supported by Oracle. "

== Tutorial ==

Oracle Orion tool - Measuring Disk I/O—Oracle’s ORION Tool - http://www.jameskoopmann.com/docs/MeasuringDiskIOOraclesORIONTool.htm

:"Oracle’s ORION workload tool enables architects to effectively develop a workload that can mimic and stress a storage array in the same manner as planned applications with an Oracle backend database."

:"To complete and increase your ability to model an the physical aspects of an Oracle database it is advantageous for the designer to test a disk configuration before they actually install an Oracle database on top of it. For this reason I suggest you take a look at Oracle’s ORION tool to help benchmark your storage architecture. The proper benchmarking can be the difference between the same hardware having poor or excellent performance. Through the use of Oracle’s ORION workload tool Database Architects can effectively develop a workload that can mimic and stress a storage array in the same manner as the planned application with an Oracle backend database. Because the ORION tool does not require a running Oracle database, multiple configurations can be tested such that an optimal storage configuration can be obtained while providing for reliability, stability, and scalability."

The Orion tool has a variety of options to fine-tune the sample workload desired to stress the storage system. Of interest are the following:

1. Run Level
1. Simple – Small and Large Random I/O are tested individually.
2. Normal – Same as the simple run level but does combinations of small and random I/Os together.
3. Advanced – Allows the user to use a wide variety of options to fine tune the workload.
2. num_disks – Defines the number of spindles in the storage array that will be tested.
3. size_small – Defines the size for small random I/O.
4. size_large – Defines the size for large random or sequential I/O.
5. type – Defines the type of large I/O (random or sequential).
6. write – Defines the percentage of writes in the workload.
7. matrix – Defines the mixture of workload to run.

It is very easy to begin using the Orion tool

1. Download Orion
2. Install by unzipping the file
3. Create a file that contains a list of raw volume or files to test
4. Execute the Orion binary with workload options
5. View the tabular output

Simple read test:
./orion_linux_em64t -run advanced -testname orion1 -num_disks 1 -write 0 -simulate concat -matrix detailed
./orion_linux_em64t -run advanced -testname orion3 -num_disks 3 -write 0 -simulate concat -matrix detailed

== Examples ==

<pre>
NAME='orion-test-run'

ORION_HOME=/orion
ORION=${ORION_HOME}/bin/orion

#PARAMS='-run advanced -num_disks 40 -size_small 8 -size_large 8 -type seq -matrix col -num_small 0 -write 99 '
#PARAMS='-run advanced -num_disks 40 -size_small 8 -size_large 8 -type seq -write 99 '
#PARAMS='-run advanced -testname mtest -num_disks 36 -simulate raid0 -write 0 -type seq -matrix basic -cache_size 16386 –verbose'

# SIMPLE TEST....
PARAMS='-run simple -testname mytest -num_disks 8'

$ORION $PARAMS -testname $NAME &
</pre>

orion-test-run.lun:
<pre>
/altamira_bd/OPGE/redos_002/prueba1.dbf
/altamira_bd/OPGE/redos_002/prueba2.dbf
/altamira_bd/OPGE/redos_002/prueba3.dbf
/altamira_bd/OPGE/redos_002/prueba4.dbf
/altamira_bd/OPGE/redos_002/prueba5.dbf
/altamira_bd/OPGE/redos_001/prueba1.dbf
/altamira_bd/OPGE/redos_001/prueba2.dbf
/altamira_bd/OPGE/redos_001/prueba3.dbf
/altamira_bd/OPGE/redos_001/prueba4.dbf
/altamira_bd/OPGE/redos_001/prueba5.dbf
</pre>

== Command Line Options ==

<pre>
# /orion/bin/orion -help
ORION: ORacle IO Numbers -- Version 11.1.0.7.0
ORION runs IO performance tests that model Oracle RDBMS IO workloads.
It measures the performance of small (2-32K) IOs and large (128K+) IOs
at various load levels. Each Orion data point is done at a specific
mix of small and large IO loads sustained for a duration. Anywhere
from a single data point to a two-dimensional array of data points can
be tested by setting the right options.

An Orion test consists of data points at various small and large IO
load levels. These points can be represented as a two-dimensional
matrix: Each column in the matrix represents a fixed small IO load.
Each row represents a fixed large IO load. The first row is with no
large IO load and the first column is with no small IO load. An Orion
test can be a single point, a row, a column or the whole matrix.

The 'run' parameter is the only mandatory parameter. Defaults
are indicated for all other parameters. For additional information on
the user interface, see the Orion User Guide.

<testname> is a filename prefix. By default, it is "orion". It can be
specified with the 'testname' parameter.

<testname>.lun should contain a carriage-return-separated list of LUNs
The output files for a test run are prefixed by <testname>_<date> where
date is "yyyymmdd_hhmm".

The output files are:
<testname>_<date>_summary.txt - Summary of the input parameters along with
min. small latency, max large MBPS
and/or max. small IOPS.
<testname>_<date>_mbps.csv - Performance results of large IOs in MBPS
<testname>_<date>_iops.csv - Performance results of small IOs in IOPS
<testname>_<date>_lat.csv - Latency of small IOs
<testname>_<date>_tradeoff.csv - Shows large MBPS / small IOPS
combinations that can be achieved at
certain small latencies
<testname>_trace.txt - Extended, unprocessed output

WARNING: IF YOU ARE PERFORMING WRITE TESTS, BE PREPARED TO LOSE ANY DATA STORED
ON THE LUNS.

Mandatory parameters:
run Type of workload to run (simple, normal, advanced, dss, oltp)
simple - tests random 8K small IOs at various loads,
then random 1M large IOs at various loads.
normal - tests combinations of random 8K small
IOs and random 1M large IOs
advanced - run the workload specified by the user
using optional parameters
dss - run with random 1M large IOs at increasing loads
to determine the maximum throughput
oltp - run with random 8K small IOs at increasing loads
to determine the maximum IOPS
Optional parameters:
testname Name of the test run
num_disks Number of disks (physical spindles). Default is
the number of LUNs in <testname>.lun
size_small Size of small IOs (in KB) - default 8
size_large Size of large IOs (in KB) - default 1024

type Type of large IOs (rand, seq) - default rand
rand - Random large IOs
seq - Sequential streams of large IOs
num_streamIO Number of concurrent IOs per stream (only if type is
seq) - default 4
simulate Orion tests on a virtual volume formed by combining the
provided volumes in one of these ways (default concat):
concat - A serial concatenation of the volumes
raid0 - A RAID-0 mapping across the volumes

write Percentage of writes (SEE WARNING ABOVE) - default 0

cache_size Size *IN MEGABYTES* of the array's cache.
Unless this option is set to 0, Orion does a number
of (unmeasured) random IO before each large sequential
data point. This is done in order to fill up the array
cache with random data. This way, the blocks from one
data point do not result in cache hits for the next
data point. Read tests are preceded with junk reads
and write tests are preceded with junk writes. If
specified, this 'cache warming' is done until
cache_size worth of IO has been read or written.
Default behavior: fill up cache for 2 minutes before
each data point.

duration Duration of each data point (in seconds) - default 60

num_small Number of outstanding small IOs (only if matrix is
point, col, or max) - no default
num_large For random, number of outstanding large IOs.
For sequential, number of streams (only if matrix is
point, row, or max) - no default

matrix An Orion test consists of data points at various small
and large IO load levels. These points can be
represented as a two-dimensional matrix: Each column
in the matrix represents a fixed small IO load. Each
row represents a fixed large IO load. The first row
is with no large IO load and the first column is with
no small IO load. An Orion test can be a single point,
a row, a column or the whole matrix, depending on the
matrix option setting below (default basic):
basic - test the first row and the first column
detailed - test the entire matrix
point - test at load level num_small, num_large
col - varying large IO load with num_small small IOs
row - varying small IO load with num_large large IOs
max - test varying loads up to num_small, num_large

verbose Prints tracing information to standard output if set.
Default -- not set

Examples
For a preliminary set of data
-run simple
For a basic set of data
-run normal
To evaluate storage for an OLTP database
-run oltp
To evaluate storage for a data warehouse
-run dss
To generate combinations of 32KB and 1MB reads to random locations:
-run advanced
-size_small 32 -size_large 1024 -type rand -matrix detailed
To generate multiple sequential 1MB write streams, simulating 1MB RAID0 stripes
-run advanced
-simulate RAID0 -stripe 1024 -write 100 -type seq
-matrix col -num_small 0
</pre>

== issues ==

=== skgfrsaiolmt failed ===

orion_warm_cache: Warming cache failed. Continuing
storax_skgfr_init: skgfrsaiolmt failed:
OER 27090: please look up error in Oracle documentation
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3
Additional information: 4096
Additional information: -1728767552
lun_init: IO init failed:rwbase_lio_init_ctx: lun_init failed
rwbase_rwluns: rwbase_lio_init_ctx failed
orion_thread_main: rw_luns failed
Non test error occurred
Orion exiting

.

orion_warm_cache: Warming cache failed. Continuing
rwbase_run_test: rwbase_reap_req failed
rwbase_run_process: rwbase_run_test failed
rwbase_rwluns: rwbase_run_process failed
orion_warm_cache: Warming cache failed. Continuing
storax_skgfr_init: skgfrsaiolmt failed:
OER 27090: please look up error in Oracle documentation
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3
Additional information: 4096
Additional information: -1728767552
lun_init: IO init failed:rwbase_lio_init_ctx: lun_init failed
rwbase_rwluns: rwbase_lio_init_ctx failed
orion_thread_main: rw_luns failed
Non test error occurred
Orion exiting

cat /proc/sys/fs/aio-max-nr
65536
echo $(( 65536 * 2 )) > /proc/sys/fs/aio-max-nr

aio-nr & aio-max-nr [http://www.mjmwired.net/kernel/Documentation/sysctl/fs.txt]

aio-nr is the running total of the number of events specified on the
io_setup system call for all currently active aio contexts. If aio-nr
reaches aio-max-nr then io_setup will fail with EAGAIN. Note that
raising aio-max-nr does not result in the pre-allocation or re-sizing
of any kernel data structures.

http://forums.oracle.com/forums/thread.jspa?threadID=952126

ORION: ORacle IO Numbers -- Version 11.1.0.7.0
sandboxtest_20090901_1216
Test will take approximately 30 minutes
Larger caches may take longer

storax_skgfr_init: skgfrsaiolmt failed:
OER 27090: please look up error in Oracle documentation
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3
Additional information: 4096
Additional information: -1323009632
lun_init: IO init failed:rwbase_lio_init_ctx: lun_init failed
rwbase_rwluns: rwbase_lio_init_ctx failed
orion_thread_main: rw_luns failed
Non test error occurred
Orion exiting

See if helps:http://chandrapabba.blogspot.com/2009/07/ora-27090-message-27090-not-found-on.html

http://chandrapabba.blogspot.com/2009/07/ora-27090-message-27090-not-found-on.html

Here is how it looked like before starting up an 10.2.0.4 instance:

#/sbin/sysctl -a |grep aio
fs.aio-max-nr = 1100 #---I reset it to this value from default.
fs.aio-nr = 0

When the instance was started, the value looked like this:
#/sbin/sysctl -a |grep aio
fs.aio-max-nr = 1100 #---I reset it to this value from default.
fs.aio-nr = 1060

As soon as it hit the ceiling, the above mentioned error was reported in the alert log. When I raised the value, the error message disappeared.

OTN Discussion Forums : Orion test problem - http://forums.oracle.com/forums/thread.jspa?threadID=966193
echo 4194304 > /proc/sys/fs/aio-max-nr

== keywords ==

oracle orion

[[Category:Oracle]]

Oracle/Database/Oracle Orion - Revision history

Kenneth: Created page with "== Orion == [http://www.oracle.com/technetwork/topics/index-089595.html Oracle ORION Downloads] :"ORION (Oracle I/O Calibration Tool) is a standalone tool for calibrating th..."