The NewComer

2014-12-18

I have been trying to confirm SNS Subscription. But It just keep showing “PendingConfirmation”. After searching in aws forum, I found that they send a...

2014-11-24

Little back story: I am very much fond of Move Fast and Break Things. I am playing with varnish last 3 months. We let go 2 programmers this month and...

2014-10-04

ufw is very good tool. But if you forget to turn on ssh then you would not able to log in to your server. But you forget to enable the ssh in ec2 instance...

2014-10-01

Varnish can add a extra layer of security as well as HTTP accelerator. https://github.com/comotion/VSF is a Web Application Firewall (WAF) written using...

2014-09-28

Building a Varnish VMOD in ubuntu is bit complicated process. we are going to use varnish-3.0.5. For VMOD we are going to use https://github.com/varnish...

2014-09-16

BackendPolling can reduce Varnish 503 errors. Varnish poll by opening a new TCP connection to the backend on which we send a preconfigured request, wait...

2014-09-11

Configuring MySQL server for high traffic site is very hard. You have to consider many things. One of the pitfall for unweary person like me is query...

2014-08-14

Recently while fixing a bug, I found out that there are multiple copies of same cronjob running at the same time. Normally, the task completes in just...

2014-08-11

Recently during some bug fixing, I found out that our database server’s time is 5 minutes off. First I thought probably the timezone was correct. Then...

2014-05-12

I have been trying to speed up somewhereinblog.com. Among many other things, I am trying to add Varnish cache. While setting Varnish on our test server...