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<blockquote data-quote="tourettes" data-source="post: 938950" data-attributes="member: 10858"><p>1080p doesn't have anything to do with scene releases - it can be also DVB-S2 / DVB-S / DVB-C / DVB-T sourced where it has same bitrate characteristics as 1080i. 1080i alone wont indicate any higher bitrate than the 1080p would be - usually it is the opposite as interlacing has been initially developed to reduce the used bandwidth (on analog world it reduces the bandwidth 50%).</p><p> </p><p>Blu-ray has maximum / peak bitrate around 40Mbit/s, based on <a href="http://www.advantechwireless.com/wp-content/uploads/DVB-S2-theory.pdf" target="_blank">http://www.advantechwireless.com/wp-content/uploads/DVB-S2-theory.pdf</a> DVB-S2 has around 21.5Mbit/s peak rate with 8Mhz bandwidth.</p><p> </p><p>OS itself will be limiting the read/write bandwidth requirements by caching the just written / hot data in the filesystem cache. This will effectively remove the simultaneous read & write operations to a simple write operations (unless all users would be having long timeshifting buffers - which wouldn't be possible with the RAM disk in any case as it would run out of the space as well).</p><p> </p><p>HDD (just picked up some random few years old review, smaller than 1 GB drives) - <a href="http://www.storagereview.com/hitachi_travelstar_7k500_review" target="_blank">http://www.storagereview.com/hitachi_travelstar_7k500_review</a> . Best matching speed test is the 2 MB random write (even thou our writes are quite much sequential unless the HDD is really fragmented & full). Slowes drive did have around 37MB/s write performance.</p><p> </p><p>From pure numbers it would be visible than you have no issues with ten simultaneous HD channels. As roughly 37 / (21.5 / 8) ~~ 13.7. To play safe you could divide the result with four and still have around 3 channels.</p></blockquote><p></p>
[QUOTE="tourettes, post: 938950, member: 10858"] 1080p doesn't have anything to do with scene releases - it can be also DVB-S2 / DVB-S / DVB-C / DVB-T sourced where it has same bitrate characteristics as 1080i. 1080i alone wont indicate any higher bitrate than the 1080p would be - usually it is the opposite as interlacing has been initially developed to reduce the used bandwidth (on analog world it reduces the bandwidth 50%). Blu-ray has maximum / peak bitrate around 40Mbit/s, based on [url]http://www.advantechwireless.com/wp-content/uploads/DVB-S2-theory.pdf[/url] DVB-S2 has around 21.5Mbit/s peak rate with 8Mhz bandwidth. OS itself will be limiting the read/write bandwidth requirements by caching the just written / hot data in the filesystem cache. This will effectively remove the simultaneous read & write operations to a simple write operations (unless all users would be having long timeshifting buffers - which wouldn't be possible with the RAM disk in any case as it would run out of the space as well). HDD (just picked up some random few years old review, smaller than 1 GB drives) - [url]http://www.storagereview.com/hitachi_travelstar_7k500_review[/url] . Best matching speed test is the 2 MB random write (even thou our writes are quite much sequential unless the HDD is really fragmented & full). Slowes drive did have around 37MB/s write performance. From pure numbers it would be visible than you have no issues with ten simultaneous HD channels. As roughly 37 / (21.5 / 8) ~~ 13.7. To play safe you could divide the result with four and still have around 3 channels. [/QUOTE]
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