Sponsored Content
Special Forums Hardware SAS or SSD for Ubuntu 14.04 and data analysis Post 302966538 by bakunin on Saturday 13th of February 2016 06:28:44 AM
Old 02-13-2016
Not directly related but i had a longer workshop yesterday about our new storage system (EMC VMax 200k). EMC claims that they had intended the 300GB 15k-SAS drives for high-performance, but phase them out now because (quoting from memory) with the development of Flash-SSDs its just not worth it any more. They also claim that, because they use SLC-based hardware, they have even lower rates of disk-replacement, even in heavy-duty transactional storage systems, than with rotational disks, to which a much lower energy consumption of the SSDs compared to the 15k-SAS disks contributes. There is simply less heat involved and that shows when you pack some ~2500 disks into a rack.

You haven't said where you are going to place the workstation, but in case it is going to be somewhere near your desk: 15k-disks are awefully LOUD in addition to be premier heating devices while SSDs are completely silent.

I hope this helps.

bakunin
These 2 Users Gave Thanks to bakunin For This Post:
 

6 More Discussions You Might Find Interesting

1. UNIX and Linux Applications

help needed- data analysis-table-chart-2d plot software

Hi all, I posted the same message under 'Kaleidagraph like software for Ubuntu' thread. I guess there may not be many people familiar with Kaleidagraph. So I post my message under another subject name. I need a tool for Ubuntu 8.10, -which is quick and easy to learn and use (as I am... (1 Reply)
Discussion started by: apprentice
1 Replies

2. BSD

Using SSD in FreeBSD

Now that SSD drives are becoming mainstream, I had a few questions on installing a SSD drive in a FreeBSD environment. Can FreeBSD be made SSD aware, that is, somehow let FreeBSD know that reads and writes should be limited or deferred to extend the disk's life? Is there a setting for wear... (0 Replies)
Discussion started by: figaro
0 Replies

3. Red Hat

What is the best tools for performance data gathering and analysis?

Dear Guru, IHAC who complaint that his CentOS is getting performance issue. I have to help him out of there. Could you please tell me which tools is better to gathering the whole system performance data? -- CPU/Memory/IO(disk & Network)/swap I would like the tools could be... (6 Replies)
Discussion started by: devyfong
6 Replies

4. Shell Programming and Scripting

Help with analysis data based on particular column content

Input file: Total_counts 1306726155 100% Number_of_count_true 855020282 Number_of_count_true_1 160014283 Number_of_count_true_2 44002825 Number_of_count_true_3 18098424 Number_of_count_true_4 24693745 Number_of_count_false 115421870 Number_of_count_true 51048447 Total_number_of_false ... (2 Replies)
Discussion started by: perl_beginner
2 Replies

5. UNIX for Dummies Questions & Answers

Data analysis, Regular Expression - Unix

Hey every one! I have a dataset like this : 1 100 1 0 5 100 1 8 7 50 1 0 7 100 2 0 10 20 1 8 10 30 1 8 10 100 3 8 15 50 5 0 20 90 1 0 20 99 9 0 I wanna check if the 4th column is 0 or 8 If it's zero write the 1st column itself, if it's 8 write sum of 1st and second something... (2 Replies)
Discussion started by: @man
2 Replies

6. UNIX for Dummies Questions & Answers

What should I format my SSD with?

Hello All, I recently received a new SSD that I am going to use for the purpose of Booting Virtual Machines. I use VMWare Player to boot Windows Guest Operating Systems onto my Linux Laptop. I currently have a SSD drive that I use for this exact same purpose that is formatted as ext3 and I'm... (3 Replies)
Discussion started by: mrm5102
3 Replies
vxpfto(1M)																vxpfto(1M)

NAME
vxpfto - set Powerfail Timeout (pfto) SYNOPSIS
vxpfto -g diskgroup -t timeout vxpfto [-g diskgroup] -t timeout volume_list vxpfto [-g diskgroup] -o pftostate={enabled|disabled} vxpfto [-g diskgroup] -o pftostate={enabled|disabled} volume_list DESCRIPTION
Powerfail Timeout is an attribute of a SCSI disk connected to an HP-UX host (see the pfto(7) man page). The vxpfto command sets the Power- fail Timeout interval on a set of Volume Manager disks, either all disks in a disk group, or all disks underlying the volumes listed. The first form of the command sets the same PFTO value for all the disks in the specified VxVM diskgroup. In the second form, all disks underlying the given list of volumes are selected, optionally restricted by the disk group specified with the -g option. If you specify a diskgroup, any volume in the list not belonging to the diskgroup is ignored. Use the -o pftostate option to disable or enable PFTO. By default, PFTO is enabled. You can enable PFTO either on all disks in a disk group, or on all disks underlying the volumes listed. If you invoke vxpfto without arguments, it displays a usage message. OPTIONS
-g diskgroup Specifies the disk group for the operation, either by disk group ID or by disk group name. -o pftostate={enabled|disabled} Enables or disables the use of PFTO for IO. -t timeout Specifies the PFTO value in seconds. The value must be zero or a positive integer. Zero represents the system default PFTO value. The default value depends on the disk driver controlling the disk device. volume_list A list of VxVM volume names. List items must be separated by white-space. EXIT CODES
vxpfto returns a zero if successful. If it encounters an error, vxpfto exits and displays a message on standard error. Defined exit codes are: 0 Success. 1 No PFTO value specified. 2 No diskgroup or volume list specified. 3 Illegal PFTO value specified. EXAMPLES
Set the PFTO value on all disks in disk group testdg to 100 seconds: vxpfto -t 100 -g testdg Set the PFTO value to 50 seconds on all disks underlying volume01 and volume02 in disk group testdg: vxpfto -t 50 -g testdg volume01 volume02 Set the PFTO value to 300 seconds on all disks underlying volume01 and volume02, even though they are not in the same disk group: vxpfto -t 300 volume01 volume02 Disable PFTO on all disks in disk group testdg: vxpfto -g testdg -o pftostate=disabled Enable PFTO on all disks underlying volume01 and volume02i in disk group testdg: vxpfto -g testdg -o pftostate=enabled volume01 volume02 SEE ALSO
vxdisk(1M), pfto(7) VxVM 5.0.31.1 24 Mar 2008 vxpfto(1M)
All times are GMT -4. The time now is 04:20 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy