All posts by PF

Google Web Search API limitation

 

Free quota

Usage is free for all users, up to 100 queries per day.

Paid Usage

Any usage beyond the free usage quota will fail if you are not signed up for billing. Once you have enabled billing, you will continue to receive 100 free queries per day. However, you will be billed for all additional requests at the rate of $5 per 1000 queries, for up to 10,000 queries per day. If you need additional quota, please request additional quota from the console.

OpenStack Havana Demo

Mark Collier, COO of the OpenStack Foundation, shows off some of the new services enabled by OpenStack Havana such as Metering and Orchestration.

OpenStack Havana

OpenStack Havana, the eighth release of the open source software for building public, private, and hybrid clouds, has nearly 400 new features to support software development, managing data and application infrastructure at scale. The OpenStack community continues to attract the best developers and experts in their disciplines with 910 individuals employed by 145 different organizations contributing to the Havana release.

Learn all about Havana at the Hong Kong OpenStack Summit

 

Facebook – 2 petabytes in a rack

Each disk in the cold storage gear can hold 4 terabytes of data, and each 2U system contains two levels of 15 disks. In other words, each unit can handle 120 terabytes. A rack could hold 16 of these storage systems, allowing for 2 petabytes of cold storage in a rack.

Source: http://www.datacenterknowledge.com/archives/2013/10/16/first-look-facebooks-oregon-cold-storage-facility/

You can read more at how to create this servers on

Hacking Conventional Computing Infrastructure » Open Compute 

www.opencompute.org/

By releasing Open Compute Project technologies as open hardware, our goal is to develop servers and data centers following the model traditionally associated 

500 OOPS: priv_sock_get_cmd or 500 OOPS: vsftpd: refusing to run with writable root inside chroot()

500 OOPS: priv_sock_get_cmd

macbook:~ PJunior$ ftp [email protected]
Connected to example.com.
500 OOPS: priv_sock_get_cmd
ftp: Can't connect or login to host `example.com'

Open /etc/vsftpd.conf and at the end  add

seccomp_sandbox=NO

and restart the Server:

sudo service vsftpd restart

ssd-virtual-servers-banner-2-728x90

500 OOPS: vsftpd: refusing to run with writable root inside chroot()

macbook:~ PJunior$ ftp [email protected]
Connected to example.com.
500 OOPS: vsftpd: refusing to run with writable root inside chroot()
ftp: Can't connect or login to host `example.com'

Open /etc/vsftpd.conf and at the end  add

 allow_writeable_chroot=YES

and restart the Server:

sudo service vsftpd restart