[Apt-Rpm] Apt-rpm on embedded Linux, is it impossible?
Quan phongvan
phongvan84 at gmail.com
Sun Jan 13 22:50:33 PST 2008
Dear Jean-seb,
It's so kind of you to answer all of my issues with very useful
informations. I really appreciate it.
But I still have some things from your reply, and I hope that you can clear
them for me, thank you in advance.
1. You mentioned: "No, it use apt only, personally I hate yum and don't
understand why create an other tool for rpm based distro, apt was already
here and do the work well; and the best,". I think that while yum has
released its stable version so long time ago, apt-rpm is still under
developing (testing version). In addition, yum has a huge developer resource
behind, if we consider update tool from business point of view, can yum
become a update tool candidate?
2. About yum and python, I was already clear, thank you for your model, it's
so easy for me to understand the problem. If you don't mind, have you ever
tried smartpm as a update tool on your embedded system (smartpm similar to
yum and apt-rpm, it uses python also), if yes do you have any advice for me
about smartpm?
3. My target system run on a very tiny Linux clone (mini-ram embeeded Linux
- RPM system, like VxWorks), it lacks development tool such as gcc and
XWindow, so will apt-rpm run well on these systems?. Beside, our update tool
connect Internet through firewall for security purpose to do system-update,
so we must consider some security issues such as: session hijack or disguise
of server. Do you have any comments for me with apt-rpm to deal with these
problems?
Thank you very much.
Hope to see your reply soon.
Best regards,
Nguyen Anh Quan.
On Jan 13, 2008 12:09 AM, jean-seb <jsh at interlug-fr.org> wrote:
> Quan phongvan a écrit :
> > Dear Jean-seb,
> > It's so nice for me to hear that from you. If you don't mind, can you
> > give me more advices for my issues:
> > 1. For your mentioned RHEL clone that you used on your embedded
> > system, Does it have yum as RPM packages management systems. If yes,
> > can apt-rpm beats yum as a update tool?
>
> it is use in Debian and Rpm based distro, so when you swith into Debian
> and Rpm distro, no problem: apt-get update, apt-get dist-upgrade ... :)
>
>
> > 2. As you mentioned "apt is faster than light , and it don't need
> > python; so the memory it use is not a big issue.", I think apt-rpm has
> > a big dependency list (especially when I compiled apt-rpm from source
> > code, it required a lot of packages such as: beecrypt, zlib,...).
> > About python, does it really become the most biggest obstacle for yum
> > or even smartpm (an update tool for RPM packages similar to yum and
> > apt-rpm).
> Yum use python and a lot of sub-modules (how it query the rpm database?);
> the main problem I see: you need a pre-interpreter to run yum:
> So you can resume it by:
> kernel -> glibc -> python -> pre-compiling -> yum+ extra modules
>
> for apt:
> kernel -> glibc -> libs (stdc++, zlib) -> apt
>
> Pre-compiled software runs always faster ( C and C++ are faster than
> Python).
>
> If you have time: you can test this 'theory' with gdb and see what
> program (yum or apt) use the most of memory :)
>
>
> > 3. In addition, can you give more details why did you mention about HP
> > Server ProLiant in: "it is faster that the same version in Proliant
> > Servers ! (maybe because /var is in ram?)".
>
> We use one distro (Gralinux AS 3; a RHEL clone with some tweaks; webmin,
> openvpn, more iptables modules etc..) on both Embedded systems and
> Servers: the binaries are strictly the same.
> we have a lot of HP proliant and when i apply updates, apt is far faster
> on embedded devices than on the big Proliant :) : a read/write issue i
> think ;)
> We all know than hard drive are .. slow :-/ , specially with Raid 5 ...
>
> > Hope to receive your advice soon,
> > Best regards,
> > Nguyen Anh Quan.
>
> Regards
>
> js.
>
> Air-Austral flight Company.
> http://www.air-austral.com
>
> >
> > On Jan 11, 2008 7:13 PM, jean-seb <jsh at interlug-fr.org
> > <mailto:jsh at interlug-fr.org> > wrote:
> >
> > Quan phongvan a écrit :
> > > Dear friends,
> > >
> > > I've studied apt-rpm as a candidate update tool for RPM packages
> > > management system, because my target device run on embedded Linux
> > > (like Vxworks - an RTOS of windriver).
> > > If you don't mind, I hope that someone has tried using apt-rpm on
> an
> > > embedded system such as VxWorks and can share me his experiences.
> I
> > > really appreciate it.
> > > Thank you for your attention,
> > > Nguyen Anh Quan.
> > > --
> > > Never walk alone
> > >
> >
> > I use apt in a RHEL clone for embedded systems (openvpn, firewall
> and
> > tons of stuffs like snort etc..):
> > it runs on a Via C3 533Mhz, 512Mo ram (256 for the system memory,
> and
> > 256 for /var and /tmp in read/write mode);
> > the rest of the system is on a CF 512mo in read only (ext3 with
> > some tweaks)
> >
> > apt is faster than light , and it don't need python; so the memory
> it
> > use is not a big issue.
> >
> > it is faster that the same version in Proliant Servers ! (maybe
> > because
> > /var is in ram?)
> >
> > A good choice for a "big" embedded system.
> >
> >
> > Regards.
> >
> > js
> >
> > Air-Austral flight Company.
> > http://www.air-austral.com
> >
> >
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> >
> >
> >
> >
> > --
> > Never walk alone
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