Blogs

Tuning ext4 Creation and Mount Options for Zimbra

February 2, 2015

Zimbra is a email collaboration suite. Its various compontents perform MTA duties, message store, full text indexing. In a large environment, the number of files and I/O operations can really add up. How we ensure the filesystem is ready to support it? Zimbra’s Recommendations Zimbra offers some guidance for tuning the filesystem, with tips like: Mount file systems with the noatime option. It generally is not important to know the last access time of all the files, so the extra write ops are wasteful.

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Using Ansible Filters to Customize the Order Of Hosts in a List

February 1, 2015

Zimbra is a email / collaboration suite that is typically deployed in a cluster or clusters of dedicated servers which fill roles like LDAP master, LDAP replica, Proxy, MTA, Mailstore, etc. The LDAP servers are used by all the other servers to store configuration and provisioning data. Servers in the cluster understand where to find the LDAP master (read/write) and LDAP replicas (read only) though values defined in /opt/zimbra/conf/localconfig.xml. There are 2 values relevant to LDAP server lists and they have values like this:

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Openshift V2 and Flask with Virtualenv on OS X

November 22, 2014

Create a flask app for Openshift with a matching local python virtualenv to perform local testing. In this case we’ll use Python 2.7 on Mac OS X 10.9. Overview of the steps Install Homebrew Install Python Development Environment on Mac OS X Install rhc client tools. Install and Configure a Python Flask for OpenShift Installing Homebrew Ready the system for Homebrew First unhide ~/Library folder. Open Finder Press shift-command-H Press command-J Check Show Library Folder Now Setup shell environment Some of these settings are only relevant to later steps, but go ahead and put them all in now.

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