EPICS Home

Experimental Physics and Industrial Control System


 
1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  <20172018  2019  2020  2021  2022  2023  2024  Index 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  <20172018  2019  2020  2021  2022  2023  2024 
<== Date ==> <== Thread ==>

Subject: Area Detector and high performance NVME devices
From: "Mark S. Engbretson" <[email protected]>
To: "Mark Rivers" <[email protected]>, <[email protected]>
Date: Tue, 27 Jun 2017 12:23:59 -0500

Mark –

 

I have the adimec camera which generates data at  ~2.5 GB/s. I recently got my hands on a newer HP 840 with a HP Turbo Z nvme drive which claims a sustained write speed of 6 GB/S. None of the existing file plugin see any performance increase when writing to this device – I do not think that any are actually write limited.  I have modified a raw binary file plugin that I obtained from Keenan Lang that easily sustains the cameras write rate until the device is full.

 

Problem is – Raw data really doesn’t do anyone much good. I was thinking that perhaps a quick solution to my problem might be to change this Raw File plugin to look/act like a disk based fifo or circular buffer. This could collect to the limit of the hardware at full speed, and if someone wanted HDF output, they would just drain this queue at the speed that HDF files are generated.  Or is there an easier/better solution? I.e. any way that file plugins can use the new multi-thread model of AD 3.0?

 

I know the HDF files can be generates at very high speeds on Lustre file systems, but this seems to be using parallel HDF5. Is this something that Area Detector supports?


Replies:
RE: Area Detector and high performance NVME devices Mark Rivers

Navigate by Date:
Prev: Re: jca question Jeong Han Lee
Next: RE: Area Detector and high performance NVME devices Mark Rivers
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  <20172018  2019  2020  2021  2022  2023  2024 
Navigate by Thread:
Prev: css running not fluent 王鹏鹏
Next: RE: Area Detector and high performance NVME devices Mark Rivers
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  <20172018  2019  2020  2021  2022  2023  2024