Cloudera raises $40m. Accel announces $100m fund. Rackspace takes OpenStack private. And more.
# Accel Partners …[Read more...]
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Usually my posts are MySQL related though sometimes I will add
something that I find that may not be related to MySQL....
like this. Sorry guys at http://planet.mysql.com :)
Here is a cool little NetApp feature to see where all the lovely windows CIFS traffic is going.
The command is 'cifs top' and it needs to have stats capture enabled on the NetApp for it to work. Here it is in action.
nas01b> options cifs.per_client_stats.enable true
nas01b> cifs top
ops/s reads(n, KB/s) writes(n, KB/s) suspect/s IP Name
44 | 6 206 | 0 0 | 0 | 127.0.0.1 IMG01\notreal
We don’t pay enough attention to Hadoop.
By “we” I mean DBAs, the rest of the world is paying plenty of attention to Hadoop. Recently, I started asking my customers and fellow DBAs about Hadoop adoption in their company. Turns out that many of them have Hadoop. Hadoop shows up in large companies and small ones, in established industries and in startups. Its everywhere.
The way Hadoop shows up in all companies, and the way DBAs don’t
pay Hadoop much attention, reminds me a lot of how MySQL started
showing up in the enterprise. It didn’t start by DBAs showing up
one morning and telling their managers:
“There’s this new open …
We noticed some performance issues on one of our Netapp Filers
and during my investigation I noticed a few things that happen
under the covers and I wanted to share them with you.
Netapp SnapMirror is an asynchronous method of mirroring files from one location to another. At my company we use it to replicate property images from one datacentre to another. I've always wondered what happens to the replica as SnapMirror is a block copy though obviously the destination may be different therefore it needs to do something 'smart' to correct the differences between the two filers.
The 'smart'ness is what is causing performance …
Netapp, enterprise network attached storage devices with OS, Data
ONTAP has a per volume specific variable called 'maxfiles'.
Basically the maximum number of inodes the volume can consume
independent of disk utilization.
Unfortunately this variable must be set per volume, it cannot be 'unlimited' and it cannot be downsized.
According to the man page:
maxfiles increases the number of files that a volume can
hold, as close as possible to max. File inodes are stored
in blocks, and the filer may round the requested max num-
ber of files to the nearest block.
Last week, I was at the NetApp office in North Sydney for the presentation on NetApp SnapManager for Oracle. It was good opportunity to learn more about NetApp snapshots while working on a project for one of our clients in Sydney. It was an especially interesting topic as I have some experience using Veritas Checkpoints (see my presentation on test systems refreshes), and it was interesting to …[Read more...]
It's been over a month (and three hurricanes in America) since I've posted a blog. More than a few of you've noticed - thanks for the prodding...
It's been a busy summer, on nearly every front. Customer activity hasn't slowed down, and the good news surrounding the (otherwise unfortunate) economic crisis embroiling many customers (especially those in the financial services industry, a heavy concentration for Sun) is that it's whipping up the winds of change. Customers facing spending pressure, or tiring of vendor price increases have new options, and there's a new appetite to explore those options (nothing like mandates from the CEO to reduce spending by 50%). …[Read more...]
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