Utility to record IO statistics (random/sequential, block sizes, read/write ratio) in Unix

Posted by Michael Pearson on Server Fault See other posts from Server Fault or by Michael Pearson
Published on 2012-09-10T03:05:05Z Indexed on 2012/09/10 3:39 UTC
Read the original article Hit count: 167

Filed under:

unix

|

io

|

statistics

As part of provisioning our new server (see other SF) I'd like to find out the following:

ratio of random to sequential reads & writes
amount of data read & written at a time (pref in histogram form)

I can already figure out our reads/writes on a per-operation and overall data level using iostat & dstat, but I'd like to know more. For example, I'd like to know that we're mostly random 16kb reads, or a lot of sequential 64kb reads with random writes.

We're (currently) on an Ubuntu 10.04 VM.

Is there a utility that I can run that will record and present this information for me?

© Server Fault or respective owner

Related posts about unix

polkit: disable all users except those in group wheel?

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
Is it possible to do the following using 1 polkit .pkla file? Disable all users except those in the wheel group from using polkit. The users in the wheel group will need to provide the root password when using polkit. /etc/polkit-1/localauthority/50-local.d/wheel-only.pkla [disable all users… >>> More
How to find other end of unix socket connection?

as seen on Server Fault - Search for 'Server Fault'
I have a process (dbus-daemon) which has many open connection over UNIX sockets. One of these connections is fd #36: =$ ps uw -p 23284 USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND depesz 23284 0.0 0.0 24680 1772 ? Ss 15:25 0:00 /bin/dbus-daemon --fork… >>> More
Meaning of directories on Unix and Unix like systems

as seen on Server Fault - Search for 'Server Fault'
I've been using Linux for a couple of years now but I still haven't figured out what the origin or meaning of some the directory names are on Unix and Unix like systems. E.g. what does etc stand for or var? Where does the opt name come from? And while we're on the topic anyway. Can someone give a… >>> More
Easy understanding of UNIX and UNIX shell scripting!!

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi All, I am beginner to UNIX,UNIX Shell Scripting. Can you please guide me through any excellent sites for unix(which are easy to understand),some study materials(tutorials),video tutorials. Please help!! Thanks! >>> More
Is Mac OS X a licensed Unix or Unix-like clone that conforms to Unix specification?

as seen on Super User - Search for 'Super User'
Is Mac OS X developed on a licensed Unix or is it a Unix-like clone that, unlike Linux, conforms to Unix specification well enough to be registered as a Unix OS. Not until Leopard, Mac OS X did not gain the Unix certification. But in Leopard, Terminal still print: GNU bash, version 3.2.48(1)-release… >>> More

Related posts about io

LDom Direct - IO gives fast and virtualized IO to ECI Telecom

as seen on Oracle Blogs - Search for 'Oracle Blogs'
By Orgad Kimch, Principal Software Engineer. Originally posted on Openomics blog. "As one of the leading suppliers in the telecom networking infrastructure, ECI has a long term relationship with Oracle. Our main Network Management products are based on Oracle Database, Oracle Solaris … >>> More
Getting ZFS per dataset IO statistics (or NFS per export IO statistics)

as seen on Server Fault - Search for 'Server Fault'
Where do I find statistics about how IO is divided between zfs datasets? (zpool iostat only tells me how much IO a pool is experiencing.) All the relevant datasets are used through NFS, so I'd be happy with per export NFS IO statistics also. We're currently running OpenIndiana [edit] It seems… >>> More
Garbled text in Screen [closed]

as seen on Server Fault - Search for 'Server Fault'
The graphical Interface in my system is garbled with some text. At the beginning I thought it was due to java and tomcat that I installed. But after removing java and tomcat, it is still the same. I am using ubuntu server and i have installed xfce desktop environment with oboard softkey I have… >>> More
How can I setup dependencies for Axis2 / Axiom on Maven2

as seen on Stack Overflow - Search for 'Stack Overflow'
I've tried the following settings on pom.xml to use Axis2 wsdl2code: <dependencies> <dependency> <groupId>org.apache.axis2</groupId> <artifactId>axis2</artifactId> <version>1.5.1</version> </dependency> </dependencies> ... <build> … >>> More
Make error when compiling Perl 5.12.1 (RHEL 5.5)

as seen on Server Fault - Search for 'Server Fault'
I am trying to compile Perl 5.12.1 in my home directory on Red Hat Enterprise Linux 5.5. However, when I try to make, I eventually receive the following error: Making IO (all) make[1]: Entering directory `/users/rmi1/build/perl-5.12.0/dist/IO' make[1]: Leaving directory `/users/rmi1/build/perl-5… >>> More