| reply to SmartWater
Re: FiOS Unadvertised Symmetrical Plan 25/25 Is there a benchmark that would test bi-directional transfer? because with 25/15, I get 24/21 on speakeasy, but actual concurrent transfer is a combined throughput of 25 instead of 40+. |
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watice
join:2008-11-01
New York, NY | said by Opteron :
Is there a benchmark that would test bi-directional transfer? because with 25/15, I get 24/21 on speakeasy, but actual concurrent transfer is a combined throughput of 25 instead of 40+.
umm, isn't this the way it's supposed to work? the speeds are not concurrent speeds, you need to account for overhead (acks and whatnot) |
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No, if you were having delayed acks, you would be seeing the throughput in the other direction suffer. Think about this for a minute: you are using 10mb downstream and nothing (significant) upstream. If you tried to push 15mb upstream, the acks for that traffic (which consume down bandwidth) would certainly not add up to 10mb more.
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 pflogBueller? Bueller?Premium,MVM
join:2001-09-01
El Dorado Hills, CA
kudos:3 | reply to Opteron
said by Opteron :
Is there a benchmark that would test bi-directional transfer? because with 25/15, I get 24/21 on speakeasy, but actual concurrent transfer is a combined throughput of 25 instead of 40+.
The speeds are 25/25, meaning the downstream bandwidth available is 25 Mbps, and the upstream bndwidth available. A certain part of the opposite direction is required for ACKs, true, so all things being equal you might see 24 Mbps if you were simultaneously uploading and downloading.
From your statement, it sounds like you were expecting ~50 Mbps (2x25 Mbps) if you weren't uploading anything. It doesn't work that way.
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He who is not contented with what he has, would not be contented with what he would like to have. -Socrates |
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| I don't read it that way. He says: "actual concurrent transfer is a combined throughput of 25 instead of 40+." I take that to mean maxed out one way and trying to push 15 or so the other way, and not seeing that, and that's a valid concern, IMO. |
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 darciliciousCyber LibrarianPremium
join:2001-01-02
Forest Grove, OR
kudos:1 | So, he's signed up for the 25/15 plan, gets 25 up and 25 down separately but only gets ~40 (25+15!) when doing both concurrently? I don't see a problem with that  |
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| Not sure what you're getting at. If I were paying for 25 down and 15 up, but could never get both at the same time, I'd be concerned, yes, since it implies there is something odd going on (some sort of shaping, maybe?) |
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darciliciousCyber LibrarianPremium
join:2001-01-02
Forest Grove, OR
kudos:1 | Oops, I missed the combined "21" -- thought the OP was saying they weren't achieving the combined "50"... my bad! |
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