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Re: [opensuse] Mundo real Sata-disco de II-a-disco throughput? 77MB/sec

To: "David C. Rankin" <drankinatty@xxxxxxxxxxxxxxxxxx>, suse <opensuse@xxxxxxxxxxxx>
Subject: Re: [opensuse] Mundo real Sata-disco de II-a-disco throughput? 77MB/sec es que sobre correcto?
From: Greg Freemyer <greg.freemyer@xxxxxxxxx>
Date: Sun, 25 Sep 2011 22:45:06 -0400
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"David *C. *Rankin" <Drankinatty@xxxxxxxxxxxxxxxxxx> escribió:

>*Guys,
>
>Copiando vídeo entre dos *Seagate ST31500341CUANDO discos con *ext3
>*filesystems consigo sobre 77.8 MB/*sec. Dado son supuestos para ser 300 MB/*sec:
>
>   "Es el 77 MB/*sec cierra al mundo real *max tendría que esperar?"
>
>Entiendo que el 300 MB/*sec es el 'teórico *max' *throughput,
>pero he nunca realmente pensamiento sobre lo que el 'real-mundial *max' tendría que ser. Sé hay varios factores de hardware para numerar y medida de archivos
>que impacto 
>el índice, pero justo estoy probando para conseguir una idea si esto es razonable.
>
>La transferencia fue dirigida utilizando sobre 13 GB (sobre 1 *hr. De vídeo) de dato
> 
>en sobre 25 archivos:
>
>15:37 *archangel:/*dat_*e/*dv> *du -*hcs *sony/*dcrv-1999.0[45].[023][167890]_*
>1001*M   *sony/*dcrv-1999.04.26_08-29-00.*dv
>1.5*M    *sony/*dcrv-1999.04.26_09-46-11.*dv
>230*M    *sony/*dcrv-1999.04.26_11-24-21.*dv
>163*M    *sony/*dcrv-1999.04.26_12-47-59.*dv
>1001*M   *sony/*dcrv-1999.04.26_15-41-40.*dv
>1001*M   *sony/*dcrv-1999.04.26_15-58-20.*dv
>362*M    *sony/*dcrv-1999.04.26_16-33-49.*dv
>404*M    *sony/*dcrv-1999.04.26_17-50-38.*dv
>335*M    *sony/*dcrv-1999.04.27_02-37-23.*dv
>331*M    *sony/*dcrv-1999.04.27_09-17-43.*dv
>838*M    *sony/*dcrv-1999.04.27_11-15-13.*dv
>264*M    *sony/*dcrv-1999.04.27_14-07-24.*dv
>229*M    *sony/*dcrv-1999.04.27_20-10-51.*dv
>140*M    *sony/*dcrv-1999.04.28_07-36-11.*dv
>462*M    *sony/*dcrv-1999.04.28_08-41-43.*dv
>1001*M   *sony/*dcrv-1999.04.28_10-52-18.*dv
>584*M    *sony/*dcrv-1999.04.28_11-07-26.*dv
>373*M    *sony/*dcrv-1999.04.28_14-50-35.*dv
>1001*M   *sony/*dcrv-1999.04.28_19-47-44.*dv
>159*M    *sony/*dcrv-1999.04.28_20-07-08.*dv
>206*M    *sony/*dcrv-1999.04.29_14-38-06.*dv
>1001*M   *sony/*dcrv-1999.04.29_20-56-26.*dv
>431*M    *sony/*dcrv-1999.04.29_21-18-38.*dv
>258*M    *sony/*dcrv-1999.04.30_22-33-44.*dv
>546*M    *sony/*dcrv-1999.05.01_17-14-07.*dv
>13*G     total
>
>   El cronometrando de la transferencia era:
>
>15:37 *archangel:/*dat_*e/*dv> tiempo *cp -*uav /*dat_*e/*dv#unknown{^*sony,cinta-*idx.*txt}
>/*dat_*f/*dv/
>`/*dat_*e/*dv/*sony/*dcrv-1999.04.29_21-18-38.*dv' -> 
>`/*dat_*f/*dv/*sony/*dcrv-1999.04.29_21-18-38.*dv'
>`/*dat_*e/*dv/*sony/*dcrv-1999.04.28_14-50-35.*dv' -> 
>`/*dat_*f/*dv/*sony/*dcrv-1999.04.28_14-50-35.*dv'
>`/*dat_*e/*dv/*sony/*dcrv-1999.04.29_14-38-06.*dv' -> 
>`/*dat_*f/*dv/*sony/*dcrv-1999.04.29_14-38-06.*dv'
>`/*dat_*e/*dv/*sony/*dcrv-1999.04.28_10-52-18.*dv' -> 
>`/*dat_*f/*dv/*sony/*dcrv-1999.04.28_10-52-18.*dv'
>`/*dat_*e/*dv/*sony/*dcrv-1999.04.26_15-41-40.*dv' -> 
>`/*dat_*f/*dv/*sony/*dcrv-1999.04.26_15-41-40.*dv'
>`/*dat_*e/*dv/*sony/*dcrv-1999.04.28_20-07-08.*dv' -> 
>`/*dat_*f/*dv/*sony/*dcrv-1999.04.28_20-07-08.*dv'
>`/*dat_*e/*dv/*sony/*dcrv-1999.04.28_07-36-11.*dv' -> 
>`/*dat_*f/*dv/*sony/*dcrv-1999.04.28_07-36-11.*dv'
>`/*dat_*e/*dv/*sony/*dcrv-1999.04.27_11-15-13.*dv' -> 
>`/*dat_*f/*dv/*sony/*dcrv-1999.04.27_11-15-13.*dv'
>`/*dat_*e/*dv/*sony/*dcrv-1999.04.26_15-58-20.*dv' -> 
>`/*dat_*f/*dv/*sony/*dcrv-1999.04.26_15-58-20.*dv'
>`/*dat_*e/*dv/*sony/*dcrv-1999.04.26_12-47-59.*dv' -> 
>`/*dat_*f/*dv/*sony/*dcrv-1999.04.26_12-47-59.*dv'
>`/*dat_*e/*dv/*sony/*dcrv-1999.04.27_09-17-43.*dv' -> 
>`/*dat_*f/*dv/*sony/*dcrv-1999.04.27_09-17-43.*dv'
>`/*dat_*e/*dv/*sony/*dcrv-1999.04.29_20-56-26.*dv' -> 
>`/*dat_*f/*dv/*sony/*dcrv-1999.04.29_20-56-26.*dv'
>`/*dat_*e/*dv/*sony/*dcrv-1999.05.01_17-14-07.*dv' -> 
>`/*dat_*f/*dv/*sony/*dcrv-1999.05.01_17-14-07.*dv'
>`/*dat_*e/*dv/*sony/*dcrv-1999.04.28_19-47-44.*dv' -> 
>`/*dat_*f/*dv/*sony/*dcrv-1999.04.28_19-47-44.*dv'
>`/*dat_*e/*dv/*sony/*dcrv-1999.04.28_11-07-26.*dv' -> 
>`/*dat_*f/*dv/*sony/*dcrv-1999.04.28_11-07-26.*dv'
>`/*dat_*e/*dv/*sony/*dcrv-1999.04.27_20-10-51.*dv' -> 
>`/*dat_*f/*dv/*sony/*dcrv-1999.04.27_20-10-51.*dv'
>`/*dat_*e/*dv/*sony/*dcrv-1999.04.26_17-50-38.*dv' -> 
>`/*dat_*f/*dv/*sony/*dcrv-1999.04.26_17-50-38.*dv'
>`/*dat_*e/*dv/*sony/*dcrv-1999.04.28_08-41-43.*dv' -> 
>`/*dat_*f/*dv/*sony/*dcrv-1999.04.28_08-41-43.*dv'
>`/*dat_*e/*dv/*sony/*dcrv-1999.04.26_11-24-21.*dv' -> 
>`/*dat_*f/*dv/*sony/*dcrv-1999.04.26_11-24-21.*dv'
>`/*dat_*e/*dv/*sony/*dcrv-1999.04.26_16-33-49.*dv' -> 
>`/*dat_*f/*dv/*sony/*dcrv-1999.04.26_16-33-49.*dv'
>`/*dat_*e/*dv/*sony/*dcrv-1999.04.27_02-37-23.*dv' -> 
>`/*dat_*f/*dv/*sony/*dcrv-1999.04.27_02-37-23.*dv'
>`/*dat_*e/*dv/*sony/*dcrv-1999.04.27_14-07-24.*dv' -> 
>`/*dat_*f/*dv/*sony/*dcrv-1999.04.27_14-07-24.*dv'
>`/*dat_*e/*dv/*sony/*dcrv-1999.04.26_09-46-11.*dv' -> 
>`/*dat_*f/*dv/*sony/*dcrv-1999.04.26_09-46-11.*dv'
>`/*dat_*e/*dv/*sony/*dcrv-1999.04.26_08-29-00.*dv' -> 
>`/*dat_*f/*dv/*sony/*dcrv-1999.04.26_08-29-00.*dv'
>`/*dat_*e/*dv/*sony/*dcrv-1999.04.30_22-33-44.*dv' -> 
>`/*dat_*f/*dv/*sony/*dcrv-1999.04.30_22-33-44.*dv'
>
>Real    2*m47.980*s
>usuario    0*m0.083*s
>*sys     0*m27.982*s
>
>   Qué decir los expertos - razonable *throughput?
>
>-- 
>David *C. *Rankin, *J.*D.,*P.*E.
>-- 
>A *unsubscribe, *e-correo: *opensuse+unsubscribe@xxxxxxxxxxxx
>Puesto que órdenes adicionales, *e-correo: *opensuse+help@xxxxxxxxxxxx

David,

3.0 *gb/*sec es una velocidad de autobús.  No un disco leído/escribir velocidad.

Yo  mucho disco a copias de disco en modo leído lineal, pero pienso en plazos de min./de GB

Así que 2GB/*min no es inusual para un lento *laptop conducir

El más rápido he visto es sobre 6min./de GB  De modo que sobre 100MB/*sec.

Vuestra velocidad parece bien.

*Greg

-- 
Enviado de mi *Android teléfono con *K-9 Correo. Complacer disculparse mi *brevity.
-- 
A *unsubscribe, *e-correo: *opensuse+unsubscribe@xxxxxxxxxxxx
Puesto que órdenes adicionales, *e-correo: *opensuse+help@xxxxxxxxxxxx


"David C. Rankin" <drankinatty@xxxxxxxxxxxxxxxxxx> wrote:

>Guys,
>
>Copying video between two Seagate ST31500341AS disks with ext3
>filesystems I 
>get about 77.8 MB/sec. Given they are supposed to be 300 MB/sec:
>
>   "Is the 77 MB/sec close to the real world max I should expect?"
>
>I understand that the 300 MB/sec is the 'theoretical max' throughput,
>but I 
>have never really thought about what the 'real-world max' should be. I
>know 
>there are various factors from hardware to number and size of files
>that impact 
>the rate, but I'm just trying to get an idea if this is reasonable.
>
>The transfer was conducted using about 13 GB (about 1 hr. of video) of
>data 
>in about 25 files:
>
>15:37 archangel:/dat_e/dv> du -hcs sony/dcrv-1999.0[45].[023][167890]_*
>1001M   sony/dcrv-1999.04.26_08-29-00.dv
>1.5M    sony/dcrv-1999.04.26_09-46-11.dv
>230M    sony/dcrv-1999.04.26_11-24-21.dv
>163M    sony/dcrv-1999.04.26_12-47-59.dv
>1001M   sony/dcrv-1999.04.26_15-41-40.dv
>1001M   sony/dcrv-1999.04.26_15-58-20.dv
>362M    sony/dcrv-1999.04.26_16-33-49.dv
>404M    sony/dcrv-1999.04.26_17-50-38.dv
>335M    sony/dcrv-1999.04.27_02-37-23.dv
>331M    sony/dcrv-1999.04.27_09-17-43.dv
>838M    sony/dcrv-1999.04.27_11-15-13.dv
>264M    sony/dcrv-1999.04.27_14-07-24.dv
>229M    sony/dcrv-1999.04.27_20-10-51.dv
>140M    sony/dcrv-1999.04.28_07-36-11.dv
>462M    sony/dcrv-1999.04.28_08-41-43.dv
>1001M   sony/dcrv-1999.04.28_10-52-18.dv
>584M    sony/dcrv-1999.04.28_11-07-26.dv
>373M    sony/dcrv-1999.04.28_14-50-35.dv
>1001M   sony/dcrv-1999.04.28_19-47-44.dv
>159M    sony/dcrv-1999.04.28_20-07-08.dv
>206M    sony/dcrv-1999.04.29_14-38-06.dv
>1001M   sony/dcrv-1999.04.29_20-56-26.dv
>431M    sony/dcrv-1999.04.29_21-18-38.dv
>258M    sony/dcrv-1999.04.30_22-33-44.dv
>546M    sony/dcrv-1999.05.01_17-14-07.dv
>13G     total
>
>   The timing of the transfer was:
>
>15:37 archangel:/dat_e/dv> time cp -uav /dat_e/dv/{sony,tape-idx.txt}
>/dat_f/dv/
>`/dat_e/dv/sony/dcrv-1999.04.29_21-18-38.dv' -> 
>`/dat_f/dv/sony/dcrv-1999.04.29_21-18-38.dv'
>`/dat_e/dv/sony/dcrv-1999.04.28_14-50-35.dv' -> 
>`/dat_f/dv/sony/dcrv-1999.04.28_14-50-35.dv'
>`/dat_e/dv/sony/dcrv-1999.04.29_14-38-06.dv' -> 
>`/dat_f/dv/sony/dcrv-1999.04.29_14-38-06.dv'
>`/dat_e/dv/sony/dcrv-1999.04.28_10-52-18.dv' -> 
>`/dat_f/dv/sony/dcrv-1999.04.28_10-52-18.dv'
>`/dat_e/dv/sony/dcrv-1999.04.26_15-41-40.dv' -> 
>`/dat_f/dv/sony/dcrv-1999.04.26_15-41-40.dv'
>`/dat_e/dv/sony/dcrv-1999.04.28_20-07-08.dv' -> 
>`/dat_f/dv/sony/dcrv-1999.04.28_20-07-08.dv'
>`/dat_e/dv/sony/dcrv-1999.04.28_07-36-11.dv' -> 
>`/dat_f/dv/sony/dcrv-1999.04.28_07-36-11.dv'
>`/dat_e/dv/sony/dcrv-1999.04.27_11-15-13.dv' -> 
>`/dat_f/dv/sony/dcrv-1999.04.27_11-15-13.dv'
>`/dat_e/dv/sony/dcrv-1999.04.26_15-58-20.dv' -> 
>`/dat_f/dv/sony/dcrv-1999.04.26_15-58-20.dv'
>`/dat_e/dv/sony/dcrv-1999.04.26_12-47-59.dv' -> 
>`/dat_f/dv/sony/dcrv-1999.04.26_12-47-59.dv'
>`/dat_e/dv/sony/dcrv-1999.04.27_09-17-43.dv' -> 
>`/dat_f/dv/sony/dcrv-1999.04.27_09-17-43.dv'
>`/dat_e/dv/sony/dcrv-1999.04.29_20-56-26.dv' -> 
>`/dat_f/dv/sony/dcrv-1999.04.29_20-56-26.dv'
>`/dat_e/dv/sony/dcrv-1999.05.01_17-14-07.dv' -> 
>`/dat_f/dv/sony/dcrv-1999.05.01_17-14-07.dv'
>`/dat_e/dv/sony/dcrv-1999.04.28_19-47-44.dv' -> 
>`/dat_f/dv/sony/dcrv-1999.04.28_19-47-44.dv'
>`/dat_e/dv/sony/dcrv-1999.04.28_11-07-26.dv' -> 
>`/dat_f/dv/sony/dcrv-1999.04.28_11-07-26.dv'
>`/dat_e/dv/sony/dcrv-1999.04.27_20-10-51.dv' -> 
>`/dat_f/dv/sony/dcrv-1999.04.27_20-10-51.dv'
>`/dat_e/dv/sony/dcrv-1999.04.26_17-50-38.dv' -> 
>`/dat_f/dv/sony/dcrv-1999.04.26_17-50-38.dv'
>`/dat_e/dv/sony/dcrv-1999.04.28_08-41-43.dv' -> 
>`/dat_f/dv/sony/dcrv-1999.04.28_08-41-43.dv'
>`/dat_e/dv/sony/dcrv-1999.04.26_11-24-21.dv' -> 
>`/dat_f/dv/sony/dcrv-1999.04.26_11-24-21.dv'
>`/dat_e/dv/sony/dcrv-1999.04.26_16-33-49.dv' -> 
>`/dat_f/dv/sony/dcrv-1999.04.26_16-33-49.dv'
>`/dat_e/dv/sony/dcrv-1999.04.27_02-37-23.dv' -> 
>`/dat_f/dv/sony/dcrv-1999.04.27_02-37-23.dv'
>`/dat_e/dv/sony/dcrv-1999.04.27_14-07-24.dv' -> 
>`/dat_f/dv/sony/dcrv-1999.04.27_14-07-24.dv'
>`/dat_e/dv/sony/dcrv-1999.04.26_09-46-11.dv' -> 
>`/dat_f/dv/sony/dcrv-1999.04.26_09-46-11.dv'
>`/dat_e/dv/sony/dcrv-1999.04.26_08-29-00.dv' -> 
>`/dat_f/dv/sony/dcrv-1999.04.26_08-29-00.dv'
>`/dat_e/dv/sony/dcrv-1999.04.30_22-33-44.dv' -> 
>`/dat_f/dv/sony/dcrv-1999.04.30_22-33-44.dv'
>
>real    2m47.980s
>user    0m0.083s
>sys     0m27.982s
>
>   What say the experts - reasonable throughput?
>
>-- 
>David C. Rankin, J.D.,P.E.
>-- 
>To unsubscribe, e-mail: opensuse+unsubscribe@xxxxxxxxxxxx
>For additional commands, e-mail: opensuse+help@xxxxxxxxxxxx

David,

3.0 gb/sec is a bus speed.  Not a disk read/write speed.

I do a lot of disk to disk copies in linear read mode, but I think in terms of GB/min.

So 2GB/min is not unusual for a slow laptop drive

The fastest I've seen is about 6GB/min.  So that's about 100MB/sec.

Your speed seems good.

Greg

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