SQL Anywhere Mobile - Actual bytes transferred vs Total Bytes in ML Monitor

Author

Actual bytes transferred vs Total Bytes in ML Monitor

forums.sybase.com

2005-11-03, 8:29 pm

I'm using 9.0.2.3131 of ASA and Ultralite

I'm syncing from Ultralite to ASA through Mobilink.

I started ML Monitor then synced. I looked Total Bytes in the properties on
the Upload and Download tabs. For example one sync had 107 bytes for upload
and 3892 bytes for download.

My question is: By summing those two numbers, do I get the actual number of
bytes that were transferred over the wire? Or are those just the byte
counts of table related data?

If the latter, is there a way to know the total of all bytes transferred
over the wire during a sync session?

(We're looking at synching over expensive satellite, so therefore want to
know exactly how many k we're going to be transferring. On that note are
there any caveats we should know about when going over satellite
communication? other than it's slow)

Graham Hurst

2005-11-04, 3:24 am

The numbers reported by the Monitor are the sizes of the upload and
download streams. I think our transfer layer adds a few bytes of
overhead when it divides up the streams to put them on the wire. The OS
socket implementation may add a few bytes per packet too.

So the counts from the Monitor should be very close to the actual number
of bytes transferred on the wire, but will slightly underestimate.

You'd have to use a packet sniffer to see the actual number of bytes
sent over the wire. Many people like Ethereal (http://www.ethereal.com).

Cheers,

Graham

forums.sybase.com wrote:
> I'm using 9.0.2.3131 of ASA and Ultralite
>
> I'm syncing from Ultralite to ASA through Mobilink.
>
> I started ML Monitor then synced. I looked Total Bytes in the properties on
> the Upload and Download tabs. For example one sync had 107 bytes for upload
> and 3892 bytes for download.
>
> My question is: By summing those two numbers, do I get the actual number of
> bytes that were transferred over the wire? Or are those just the byte
> counts of table related data?
>
> If the latter, is there a way to know the total of all bytes transferred
> over the wire during a sync session?
>
> (We're looking at synching over expensive satellite, so therefore want to
> know exactly how many k we're going to be transferring. On that note are
> there any caveats we should know about when going over satellite
> communication? other than it's slow)

Sponsored Links