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Full Discussion: ISCSI poor performance 1.5MB/s fresh install AIX7.1
Operating Systems AIX ISCSI poor performance 1.5MB/s fresh install AIX7.1 Post 302977114 by frenchy59 on Tuesday 12th of July 2016 08:11:56 PM
Old 07-12-2016
Thanks for your help Scrutinizer.

"dd if=/dev/hdisk1 of=/dev/null bs=1024k" doesn't change anything ( also tried with 256k 512k)

running two dd command simultaneously give the same result :

---
one dd command :
Code:
Network    BPS  I-Pkts  O-Pkts    B-In   B-Out
Total    8.34M   5.94K   3.96K   8.05M    302K

two dd command simultaneously :
Code:
Network    BPS  I-Pkts  O-Pkts    B-In   B-Out
Total    8.36M   5.95K   3.97K   8.06M    302K

---

For info, a ftp from the linux iscsi target to AIX:
Code:
226 Transfer complete.
2310809600 bytes sent in 37.3 secs (61991.35 Kbytes/sec)
ftp>

the other way around gives the same result.

any other idea ?

---------- Post updated at 07:11 PM ---------- Previous update was at 06:22 PM ----------

For information, if I now setup the AIX as iSCSI target, and a linux as initiator :

--on linux iSCSI initiator :
Code:
dd if=/dev/sdb of=/dev/null
^C62697+0 records in
62696+0 records out
32100352 bytes (32 MB) copied, 16.6651 s, 1.9 MB/s


--topas on AIX iSCSI target :

Code:
Network    BPS  I-Pkts  O-Pkts    B-In   B-Out 
Total    1.66M   606.5   74.00   27.8K   1.63M

Note that my disk access on the AIX is pretty good, as I have 3 SAS disk on RAID 0, I hit pretty easily the 180MB/s, so that is not the issue here ...
Last edited by Scrutinizer; 07-13-2016 at 02:30 AM..
 

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LEARN ABOUT CENTOS

locale::codes::langext

Locale::Codes::LangExt(3)				User Contributed Perl Documentation				 Locale::Codes::LangExt(3)

NAME

       Locale::Codes::LangExt - standard codes for language extension identification

SYNOPSIS

	  use Locale::Codes::LangExt;

	  $lext = code2langext('acm');		       # $lext gets 'Mesopotamian Arabic'
	  $code = langext2code('Mesopotamian Arabic'); # $code gets 'acm'

	  @codes   = all_langext_codes();
	  @names   = all_langext_names();

DESCRIPTION

       The "Locale::Codes::LangExt" module provides access to standard codes used for identifying language extensions, such as those as defined in
       the IANA language registry.

       Most of the routines take an optional additional argument which specifies the code set to use. If not specified, the default IANA language
       registry codes will be used.

SUPPORTED CODE SETS

       There are several different code sets you can use for identifying language extensions. A code set may be specified using either a name, or
       a constant that is automatically exported by this module.

       For example, the two are equivalent:

	  $lext = code2langext('acm','alpha');
	  $lext = code2langext('acm',LOCALE_LANGEXT_ALPHA);

       The codesets currently supported are:

       alpha
	   This is the set of three-letter (lowercase) codes from the IANA language registry, such as 'acm' for Mesopotamian Arabic.

	   This is the default code set.

ROUTINES

       code2langext ( CODE [,CODESET] )
       langext2code ( NAME [,CODESET] )
       langext_code2code ( CODE ,CODESET ,CODESET2 )
       all_langext_codes ( [CODESET] )
       all_langext_names ( [CODESET] )
       Locale::Codes::LangExt::rename_langext  ( CODE ,NEW_NAME [,CODESET] )
       Locale::Codes::LangExt::add_langext  ( CODE ,NAME [,CODESET] )
       Locale::Codes::LangExt::delete_langext  ( CODE [,CODESET] )
       Locale::Codes::LangExt::add_langext_alias  ( NAME ,NEW_NAME )
       Locale::Codes::LangExt::delete_langext_alias  ( NAME )
       Locale::Codes::LangExt::rename_langext_code  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangExt::add_langext_code_alias  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangExt::delete_langext_code_alias  ( CODE [,CODESET] )
	   These routines are all documented in the Locale::Codes::API man page.

SEE ALSO

       Locale::Codes
	   The Locale-Codes distribution.

       Locale::Codes::API
	   The list of functions supported by this module.

       http://www.iana.org/assignments/language-subtag-registry
	   The IANA language subtag registry.

AUTHOR

       See Locale::Codes for full author history.

       Currently maintained by Sullivan Beck (sbeck@cpan.org).

COPYRIGHT

	  Copyright (c) 2011-2013 Sullivan Beck

       This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.16.3							    2013-02-27						 Locale::Codes::LangExt(3)
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