02-11-2016
SAS or SSD for Ubuntu 14.04 and data analysis
I am in the process of building a workstation and have a question related to performance. I am a scientist who deals with big data (average file size 30-50gb). My OS is ubuntu 14.04 and so far I have a 128gb dual xeon E5-2630 with 6 cores each. I/O buffering is an issue so I am adding a 256/512? PCIe card and either 2 SSD or SAS drives for the OS and software. Since the PCIe will be separate its main purpose will be for file transfer, so would a SAS or SSD be a better fit for the OS? I am leaning towards SAS for the buffering issue, but wanted to ask more knowledgeable users. I forgot to mention that there will be a separate 1 or 2TB drive. Any recommendations for the size of the SAS or SSD? Thanks
.
6 More Discussions You Might Find Interesting
1. UNIX and Linux Applications
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
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
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
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
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
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
LEARN ABOUT SUSE
smp_rep_phy_err_log
SMP_REP_PHY_ERR_LOG(8) SMP_UTILS SMP_REP_PHY_ERR_LOG(8)
NAME
smp_rep_phy_err_log - invoke REPORT PHY ERROR LOG SMP function
SYNOPSIS
smp_rep_phy_err_log [--help] [--hex] [--interface=PARAMS] [--phy=ID] [--raw] [--sa=SAS_ADDR] [--verbose] [--version] SMP_DEVICE[,N]
DESCRIPTION
Sends a SAS Management Protocol (SMP) REPORT PHY ERROR LOG request function to a SMP target. The SMP target is identified by the SMP_DEVICE
and the SAS_ADDR. Depending on the interface, the SAS_ADDR may be deduced from the SMP_DEVICE. With one interface there is one SMP_DEVICE
per machine so the SMP_DEVICE,N syntax is needed to differentiate between HBAs if there are multiple present.
OPTIONS
Mandatory arguments to long options are mandatory for short options as well.
-h, --help
output the usage message then exit.
-H, --hex
output the response in hexadecimal.
-I, --interface=PARAMS
interface specific parameters. In this case "interface" refers to the path through the operating system to the SMP initiator. See
the smp_utils man page for more information.
-p, --phy=ID
phy identifier. ID is a value between 0 and 127. Default is 0.
-r, --raw
send the response to stdout in binary. All error messages are sent to stderr.
-s, --sa=SAS_ADDR
specifies the SAS address of the SMP target device. Typically this is an expander. This option may not be needed if the SMP_DEVICE
has the target's SAS address within it. The SAS_ADDR is in decimal but most SAS addresses are shown in hexadecimal. To give a number
in hexadecimal either prefix it with '0x' or put a trailing 'h' on it.
-v, --verbose
increase the verbosity of the output. Can be used multiple times
-V, --version
print the version string and then exit.
NOTES
Similar information is maintained for SAS SSP target phys (e.g. on a SAS disk). It can be obtained from the Protocol Specific Port log page
with the sg_logs utility.
Similar information may be obtained for SAS initiator phys (e.g. on a SAS HBA). As an example in Linux 2.6.28 error information can be
found in this directory /sys/class/sas_phy/phy-4:0 (for the phy 0 in SCSI/SAS host 4).
Similar information may be obtained for SATA device phys (e.g. on a SATA disk). If there is a SAT layer between OS and the SATA device then
the sg_sat_phy_event utility can fetch the information.
CONFORMING TO
The SMP REPORT PHY ERROR LOG function was introduced in SAS-1 . The "Expander change count" field was added in SAS-2 .
AUTHORS
Written by Douglas Gilbert.
REPORTING BUGS
Report bugs to <dgilbert at interlog dot com>.
COPYRIGHT
Copyright (C) 2006-2008 Douglas Gilbert
This software is distributed under a FreeBSD license. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PUR-
POSE.
SEE ALSO
smp_utils, smp_phy_control(smp_utils), sg_logs(sg3_utils), sg_sat_phy_event(sg3_utils)
smp_utils-0.94 December 2008 SMP_REP_PHY_ERR_LOG(8)