logs archiveBotHelp.net / Freenode / #2600hz / 2015 / July / 21 / 2
btracht
which VM platform would do prefer?
stormqloud
well, it's not the easier to work with, but xenserver hands down
btracht
i have no experience with VMs
stormqloud
I started with vmware and still have a few aroudn but for years I do 100% xenserver now
xenserver is what amazon AWS runs basically with their own mods
so if you beleive in AWS you beleive in XEn really
just take some crappy old server, download xenserver (it's open source) and install it
or vmware
vmware especially is not hard
it's idiot proof almost
btracht
looking into it right now
stormqloud
and pay around
mark2600
i use virtualbox atm
also free and easy
btracht
i'm looking to optomize performance and reliability of my switch
stormqloud
the "problem" with xenserver is to really get it singing you need to make sure you install the "xen-tools" IE patch the linux kernel!
btracht
right now everything is on its own real server
stormqloud
xenserver allows me to move live servers around without dropping calls
even 3-4 years ago I can drag and drop a VM between data centers withoutdropping the call inside the VM running FreePBX
at one point there might be a slight voice hiccup but that's it
I would not try tht with a heavily loaded freeswitch tho
but it's just to show that this VM stuff has actually gotten really good over teh years
mark2600
that is certainly true
stormqloud
I was like you guys
didn;t think they would handle it etc, over the years I've become a supporter
btracht
stormqloud: whats your switch/server architecture look like? whats using vm, real machine
stormqloud
I have my own racks in data center so it's easy for me to use exactly the hardware I want
no comprimise
btracht
i have space in DC too
stormqloud
SSD's for everythign at this point btw
mark2600
well I was always of the opinion that moving to vm's was a bad idea
but I am just a software guy, so I never had any real say in it
btracht
but i'm using all real machines now...looking to expand to second DC
stormqloud
stay with real machines if it makes you comforable for sure
when the sh*t hits the fan you do not want to be learning abotu xenserver
mark2600
that is a very valid point
stormqloud
Basically it's a question if does paying an extra $500 a month for something you already know and understand perfectly worth it
and the answer is probably yes
mark2600
also it depends on how many physical machines you have in the first place
stormqloud
well I have probably 50
more even
mark2600
if you have 1 physical server and your trying to go with 3 vm's for fault tolerance
stormqloud
I keep backup clusters even with VM's all ready to be started
mark2600
it makes less sense
well your covered then hehe
stormqloud
so if a clsuter gets fu*ked totally, I can switch to a totally different clsuter in a different DC
I have BGP also, so I can pull the IP's over between DC's
That's way ebyond what you need tho
I do that manily for servers that are not redundant like kazoo
in kazoo you should not be using bgp to pull the ip's around etvc
I'm very conservative, I keep 100% extra capacity at all times
in hardware, bandwitdth etc everythign I can
gives you options
when you need it
btracht
stormqloud: i've got some research to do on Xenserver. thanks for the insight
corbeau12
Guys, I have a transcoding issue with FS
in short, I want to avoid transcoding as much as possible
When freeswitch bridges either inbound calls from carriers to phones, or even calls from phones towards global carriers, there is G.722 <=> G.711u transcoding happening
][Sipster][
corbeau12, to avoid transcoding, you must use the same codec on both legs
corbeau12
What is needed : G.722 between phones. When using a carrier, everybody does G.711 on both legs. Anyone faced this issue ?
][Sipster][
You could try late negotiation on the media server
corbeau12
Sipster__: Well, FS has few tricks to get this not happening (late nego. etc..) SIP profile was optimized to avoid transcoding
inbound-codec-negotiation = greedy AND inbound-late-negotiation = true
I confimed that my the lab phone (aastra) offers both G.722 and G.711 in the SDP
][Sipster][
Even if it's in the offering, it doesn't mean that it will be selected/chosen. Why do you want to prevent the transcoding ?
stormqloud: Are you using blades ?
stormqloud
][Sipster][: N, but I could. just use HP DL3xx stuff
btracht
stormqloud: why do you recommend 14 servers (7 in 2 DCs) instead of 8 servers (4 in each) or something like that?
what would the advantage be?
corbeau12
Sipster__: Transcoding wastes CPU cycles for nothing
stormqloud was talking about running FS on VMs. Less you do transcoding, the better for you
Also I noticed that in the transcoding process, the voice level (audio gain) is lowered
stormqloud
corbeau12: I have sangoma cards for transcoding
corbeau12
There is an interesting channel variable that I would like to pass : inherit_codec Anyone explored this ?
stormqloud: They're the best for the bucks :)
stormqloud
yes they are great. Can share a card over freeswitch/astersik etc
unless you manage your own server in a DC you can;t use it tho
corbeau12
You did pci passthrough for this to work in your VMs ?
stormqloud
no put the card in a totally different real server
the VM's can use it over TCP
the card gets it's own /24
corbeau12
neat
stormqloud
the G729 hardware license is much cheaper then the G729 software license directly from the scumbag lawyers
that own the patents
][Sipster][
Once upon a time, there was a great card made by howler technologies alas, they are gone
They were using the same cell processor as the ps3
stormqloud
I have a couple howlers too
they are on a shelf now tho after they went bankrupt
it was a neat thing for sure. I do prefer the sangoma tho
corbeau12
G.722 to pcmu transcoding is not really costly in CPU cycles. At least nowhere near 729. But it's the drop in audio quality that bothers me.
][Sipster][
I was trying to recreate the drivers after they went bankrupt but I didn't have access to the hardware after I went on to work with another company
stormqloud
I have 2 boards and some other blank ones if you are interested
I mamaged to buy a couple of the cards that didn;t have their software on it
transcoding video ;
;-)
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