Apache Performance Tuning


Apache 2.x is a general-purpose webserver, designed to provide a balance of flexibility, portability, and performance. Although it has not been designed specifically to set benchmark records, Apache 2.x is capable of high performance in many real-world situations.

Compared to Apache 1.3, release 2.x contains many additional optimizations to increase throughput and scalability. Most of these improvements are enabled by default. However, there are compile-time and run-time configuration choices that can significantly affect performance. MPM tuning is one of the upgrades that has been made in apache 2.x.

Continue reading

tfs

TFS are not available from server


Possible Errors

TF400324: Team Foundation services are not available from server <Server/CollectionName>.
Technical Information (for administrator): Page not found
or
TF400324: Team Foundation services are not available from server <Server/CollectionName>.
Technical Information (for administrator): Unable to connect to the remote server

Root cause

This error occurs primarily due to corrupt Team Foundation Server cache.  There are several reasons why the cache can go corrupt

  • Abrupt closure of TFS services on your machine
  • Multiple versions of TFS (2010/2012/2013) configured on your machine
  • Upgrade in the version of TFS at server end, but pending upgrade on client machine
  • Corrupted installation of TFS client

Continue reading

Rsync Command :: 15 Awesome Examples


rsync stands for remote sync. rsync is used to perform the backup operation in UNIX / Linux.

rsync utility is used to synchronize the files and directories from one location to another in an effective way. Backup location could be on local server or on remote server.

Important features of rsync

  • Speed: First time, rsync replicates the whole content between the source and destination directories. Next time, rsync transfers only the changed blocks or bytes to the destination location, which makes the transfer really fast.
  • Security: rsync allows encryption of data using ssh protocol during transfer.
  • Less Bandwidth: rsync uses compression and decompression of data block by block at the sending and receiving end respectively. So the bandwidth used by rsync will be always less compared to other file transfer protocols.
  • Privileges: No special privileges are required to install and execute rsync

Continue reading

elasticsearch

How to Install Elasticsearch on CentOS, RHEL


Elasticsearch is flexible and powerful open source, distributed real-time search and analytics engine. Using a simple set of APIs, it provides the ability for full-text search. Elastic search is freely available under the Apache 2 license, which provides most flexibility.

This article will help you to install Elasticsearch on CentOS, RHEL, Ubuntu and Debian Systems.

Continue reading

redis_logo1

How to install Redis on a Centos 6.5 & Centos 7.0 Server


Redis is an open source, BSD licensed, advanced key-value store. It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets and sorted sets.

How To Install Redis on Centos 7
# wget -r –no-parent -A ‘epel-release-*.rpm’ http://dl.fedoraproject.org/pub/epel/7/x86_64/e/
# rpm -Uvh dl.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-*.rpm

Continue reading