Performance of DLZ skeleton

Meng Zhang <[email protected]> Mon, 5 Jan 2015 16:17:51 -0500
Newsgroups	gmane.network.dns.bind9.dlz
Message-ID	<[email protected]>
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Hi, @there

I=E2=80=99m implementing one DLZ driver for mongodb, but following is =
some concern about the performance of DLZ skeleton itself.

Basically, here is what I do

1. for the findzone callback
simply, return ISC_R_SUCCESS.

2. for the lookup callback, hard-code an SOA anwser there.
dns_sdlz_putrr(lookup,"SOA",3600,"ns-us.my-domain.org. =
admin.my-domain.org. 2010070801 3600 600 86400 3600");
return ISC_R_SUCCESS;

3. when registering the driver with the flag DNS_SDLZFLAG_THREADSAFE, =
the thruput is only 4476.909199 QPS
but once getting rid of DNS_SDLZFLAG_THREADSAFE, the throuput can reach =
12496.515034 QPS

The funny thing is that if I choose to use zone file implementation, the =
thruput can be 51273.505698 QPS.

I'm trying to understand what the performance penalty is within DLZ =
framework.

Any feedback is welcome!


Thanks

Regards,
Meng



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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D""><div class=3D""><br class=3D""></div><div class=3D""><font =
face=3D"Menlo" class=3D"">Hi, @there</font></div><div class=3D""><br =
class=3D""></div><div style=3D"margin: 0px;" class=3D""><div =
style=3D"margin: 0px;" class=3D""><font face=3D"Menlo" class=3D"">I=E2=80=99=
m implementing one DLZ driver for mongodb, but following is some concern =
about the performance of DLZ skeleton itself.</font></div><div =
style=3D"margin: 0px;" class=3D""><font face=3D"Menlo" class=3D""><br =
class=3D""></font></div><div style=3D"margin: 0px;" class=3D""><font =
face=3D"Menlo" class=3D"">Basically, here is what I do</font></div><div =
style=3D"margin: 0px;" class=3D""><font face=3D"Menlo" class=3D""><br =
class=3D""></font></div><div style=3D"margin: 0px;" class=3D""><font =
face=3D"Menlo" class=3D"">1. for the findzone callback</font></div><div =
style=3D"margin: 0px;" class=3D""><font face=3D"Menlo" class=3D"">simply, =
return ISC_R_SUCCESS.</font></div><div style=3D"margin: 0px;" =
class=3D""><font face=3D"Menlo" class=3D""><br =
class=3D""></font></div><div style=3D"margin: 0px;" class=3D""><font =
face=3D"Menlo" class=3D"">2. for the lookup callback, hard-code an SOA =
anwser there.</font></div><div style=3D"margin: 0px;" class=3D""><font =
face=3D"Menlo" class=3D"">dns_sdlz_putrr(lookup,"SOA",3600,"<a =
href=3D"http://ns-us.my-domain.org" class=3D"">ns-us.my-domain.org</a>. =
<a href=3D"http://admin.my-domain.org" class=3D"">admin.my-domain.org</a>.=
 2010070801 3600 600 86400 3600");</font></div><div style=3D"margin: =
0px;" class=3D""><font face=3D"Menlo" class=3D"">return =
ISC_R_SUCCESS;</font></div><div style=3D"margin: 0px;" class=3D""><font =
face=3D"Menlo" class=3D""><br class=3D""></font></div><div =
style=3D"margin: 0px;" class=3D""><font face=3D"Menlo" class=3D"">3. =
when registering the driver with the flag DNS_SDLZFLAG_THREADSAFE, the =
thruput is only 4476.909199 QPS</font></div><div style=3D"margin: 0px;" =
class=3D""><font face=3D"Menlo" class=3D"">but once getting rid of =
DNS_SDLZFLAG_THREADSAFE, the throuput can reach 12496.515034 =
QPS</font></div><div style=3D"margin: 0px;" class=3D""><font =
face=3D"Menlo" class=3D""><br class=3D""></font></div><div =
style=3D"margin: 0px;" class=3D""><font face=3D"Menlo" class=3D"">The =
funny thing is that if I choose to use zone file implementation, the =
thruput can be 51273.505698 QPS.</font></div><div style=3D"margin: 0px;" =
class=3D""><font face=3D"Menlo" class=3D""><br =
class=3D""></font></div><div style=3D"margin: 0px;" class=3D""><font =
face=3D"Menlo" class=3D"">I'm trying to understand what the performance =
penalty is within DLZ framework.</font></div><div style=3D"margin: 0px;" =
class=3D""><font face=3D"Menlo" class=3D""><br =
class=3D""></font></div><div style=3D"margin: 0px;" class=3D""><font =
face=3D"Menlo" class=3D"">Any feedback is welcome!</font></div><div =
style=3D"margin: 0px;" class=3D""><font face=3D"Menlo" class=3D""><br =
class=3D""></font></div><div style=3D"margin: 0px;" class=3D""><font =
face=3D"Menlo" class=3D""><br class=3D""></font></div><div =
style=3D"margin: 0px;" class=3D""><font face=3D"Menlo" =
class=3D"">Thanks</font></div><div style=3D"margin: 0px;" class=3D""><font=
 face=3D"Menlo" class=3D""><br class=3D""></font></div><div =
style=3D"margin: 0px;" class=3D""><font face=3D"Menlo" =
class=3D"">Regards,</font></div><div style=3D"margin: 0px;" =
class=3D""><font face=3D"Menlo" class=3D"">Meng</font></div><div =
style=3D"font-family: Menlo; margin: 0px;" class=3D""><br =
class=3D""></div></div><div class=3D""><br class=3D""></div></body></html>=

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