On 07/10/14 12:39, Otto Moerbeek wrote:
On Thu, Jul 10, 2014 at 12:20:24PM +0200, Gustav Fransson Nyvell wrote:
msgrcv(2), msgsnd(2) does exactly this. They're even syscalls. Maybe not as
toyable as a sqlite database backend but surely faster better etc. Does
anyone use them?
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the msg* api is cursed by it's SysV descend.
But as the OP never mentioned what his requiremenst are (guaranteed
delivery?, in-order?, duplicate avoidance?, hardware failure
resistance?, multi-platform?, authenticated src and dst?), any comment
is futile.
-Otto
Hi,
Oh, let me begin by saying I have some connections in AT&T, which seem
to be behind msg*. Even though they might hate me at the moment.
I think that libmessage as it works now is pretty much msg* 2.0 because
it can handle any length queueid and length message. My requirements or
target is one message sent, one message read. Order no guaranteed.
Basically like your mailbox at home or whereever you live. You get an
envelope, you can only open it once. Haha, okay, it doesn't evaporate,
these messages do. You'll have to keep a copy. Guaranteed delivery is #1
priority, nothing can be lost... There's no authentication in libmessage
but a lot in msg*. I'm kind of torn about this. Having open messaging is
quite good and if you need secrecy - encrypt. Like the internet. Because
it's a fail-safe. I'm sort of aiming for the "business" transaction
"market" where you have something like "Joe wants 2 beers" and that
message is sent to a queue and someone finds it and goes to get beers
for Joe. You know the deal. It's what MQs do, except MQs usually suck,
hard. Anyway, I'm not expecting wide adoption of libmessage, but I
wanted to ask you, how do you handle something like /tmp which has 777
permissions. Isn't that extremely unsafe? Someone could just rm it and
all hell would break loose. (I haven't run a shell service so this has
never happened to me.) Why is it 777? Shouldn't someone look at this...? :)
Off-topic: I might be dead soon, it's 32°C in my kitchen. Damn this
Swedenland suddenly a hot summer appears.
//Gustav
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