> a. With compression enabled, this would also improve the transfer time of > images.
Only if the images aren't already compressed & it seems like they might be: https://en.wikipedia.org/wiki/DICOM Pixel data can be compressed using a variety of standards, including JPEG, Lossless JPEG, JPEG 2000, and Run-length encoding (RLE). Regards, Lee On 12/27/16, Arun Kumar <[email protected]> wrote: > Hi Netpros, > > We have been doing a POC with one of our healthcare customers who are using > radiation imaging using DICOM/PACS standards. We are evaluating benefits of > WAAS with respect to this specific application. Expectations from the > customer are two-fold: > > a. Reduce the transfer time of images between application and endhost > (radiation device) > > b. Optimize WAN bandwidth and perform consistently with varying network > performance (latency and packet loss) > > Referring to this Cisco whitepaper on this topic: > http://www-v6.cisco.com/c/dam/en/us/td/docs/solutions/Verticals/waasapno... > <http://www-v6.cisco.com/c/dam/en/us/td/docs/solutions/Verticals/waasapnotes.pdf> > > POC is conducted with various features turned on in WAAS - 1. TFO only 2. > TFO with LZ and LZ 3. TFO with DRE-adaptive > > Observations are below: > > 1. TFO only - Could not see any benefit compared to without WAAS turn on > > 2. TFO and LZ - Could see benefits shown in WAAS CM (18% between original > and optimized traffic). But there is no improvement on the transfer time. > Also the peak bandwidth remains the same on the WAN > > 3. TFO, DRE adaptive and LZ - See huge benefits due caching - both on > bandwidth savings and transfer time > > Since customer would not typically re-transmit the same images multiple > times in a day, caching is not applicable to customer network. > > Below are the clarifications and recommendations that we seek after the > POC: > > a. With compression enabled, this would also improve the transfer time of > images. We are not seeing it though. Can this be related to compression and > decompression time taken by vWAAS which is off-setting the end to end WAN > latency (50ms). Or any settings to be enabled to see transfer time > improvements? > > b. For TFO to be effective, do we have to increase the buffer size and > window size? > > c. Any recommendations on the WAAS settings specific to DICOM image > transfer? > > Thanks in advance, > > Arun > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
