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Operating Systems AIX FTP Speed Problem on IBM P-Series equiped with AIX 5.2 Post 302116327 by jgt on Thursday 3rd of May 2007 07:07:45 AM
Old 05-03-2007
FTP Finite Throughput

I remember reading somewhere that the ftp protocol has inherent limitations that limit throughput, because of small block sizes and having each block acknowledged.
Can you use another protocol, like NFS or rcp?
 

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IFLASH2_MTD(4)						     Kernel Interfaces Manual						    IFLASH2_MTD(4)

NAME
iflash2_mtd - memory technology driver for Intel Series 2 flash SYNOPSIS
insmod iflash2_mtd.o [pc_debug=n] [mem_speed=n] [word_width=n] [vpp_timeout_period=n] [vpp_settle=n] [erase_timeout=n] [erase_limit=n] [retry_limit=n] [max_tries=n] [mem_speed=n] [word_width=n] DESCRIPTION
Iflash2_mtd is a memory technology driver for Intel Series 2 and Series 100 flash devices. Memory technology drivers are used by Card Ser- vices to provide device-independent access for memory cards through bulk memory services. Writing to Series 2 and Series 100 flash devices is very processor intensive. Individual words are written one at a time, at a speed of roughly 10 us per word. This busy period is too short to schedule other processes to run, so the driver will not yield the processor until an entire block is written. PARAMETERS
pc_debug=n Selects the PCMCIA debugging level. This parameter is only available if the module is compiled with debugging enabled. A non-zero value enables debugging. mem_speed=n Sets the access speed of shared memory windows, in nanoseconds. The default is 0 (i.e., no extra wait states). Values of up to 1000 are legal. word_width=n A flag indicating if memory windows should be configured for 8-bit (if 0) or 16-bit (if 1) transfers. The default is 1 (16-bit). vpp_timeout_period=n In milliseconds, this specifies the maximum idle period after a write operation before programming power will be switched off. The default is 1000 ms. vpp_settle=n In milliseconds, this gives a delay between when programming power is switched on, and when the device is assumed to be powered up and ready to receive erase or write commands. The default is 100 ms. erase_timeout=n In milliseconds, specifies the poll interval for monitoring the status of a bulk erase operation. The default is 100 ms. erase_limit=n In milliseconds, specifies the maximum elapsed time before an erase operation is assumed to have failed. The default is 10000 ms. retry_limit=n The maximum number of retries for a write operation. The default is 4. max_tries=n The maximum number of status register polls before a single word write is assumed to have timed out. The default is 4096. AUTHOR
David Hinds - dahinds@users.sourceforge.net SEE ALSO
iflash2+_mtd(4), memory_cs(4). pcmcia-cs 2000/06/12 21:24:48 IFLASH2_MTD(4)
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