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CentOS 8.x CentOS 8 released

Discussion in 'CentOS, Redhat & Oracle Linux News' started by buik, Sep 23, 2019.

  1. eva2000

    eva2000 Administrator Staff Member

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    Yeah I don't think anyone from Redhat has addressed why memory minimum requirements are rising from Redhat/CentOS 6 to 7 to 8 and where exactly that memory usage rise is coming from. But performance wise from Phoronix benchmarks, Redhat 8 is on par with Ubuntu 19 and in some cases faster for some usage. So guess memory usage is the price you pay :)
     
  2. buik

    buik “Life is trying things to see if they work.” Premium Member

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    For me personally it applies that I do not care that more memory is used. I have enough memory.

    It is that more programs run as standard. more likely get a crash, hack, problems in short.

    Less is more, if a program is not needed, then don't push it by default Red Hat.
     
  3. eva2000

    eva2000 Administrator Staff Member

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    Yeah would be interesting if someone investigated where do those increases in memory consumption go from CentOS 7 to CentOS 8 :)

    Phoronix folks did CentOS 7.7 vs CentOS 8.0 vs CentOS Stream OS benchmarks with Intel Xeon Platinum 8280 Cascade Lake and AMD EPYC 7742 Rome Initial Benchmarks Of CentOS 8.0 & CentOS Stream On Intel Xeon / AMD EPYC - Phoronix !

    Very nice performance boost for CentOS 8 & CentOS Stream OSes due to newer Linux Kernel, GCC and glibc versions !

     
  4. pamamolf

    pamamolf Premium Member Premium Member

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    Does that means that Centos 8 is faster around 30% or is it for something very specific?
     
  5. eva2000

    eva2000 Administrator Staff Member

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    Did you read the review ? Each benchmark shows the improvements for each specific benchmark test :) Not unexpected given the newer Linux Kernel, glibc and GCC versions used to build the packages. It's partially why Centmin Mod's Nginx and PHP-FPM are so much faster than other LEMP stacks due to GCC compiler/compile optimisations etc :)
     
  6. eva2000

    eva2000 Administrator Staff Member

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  7. pamamolf

    pamamolf Premium Member Premium Member

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    In a few words what's the difference for Centos 8 and Centos Stream?
     
  8. rdan

    rdan Well-Known Member

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    Based on my understanding.
     
  9. BamaStangGuy

    BamaStangGuy Premium Member Premium Member

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  10. eva2000

    eva2000 Administrator Staff Member

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    CentOS Stream OS seems to be like continuous development versions where stuff will eventually land in the next Redhat major release 9.x along with work done from Fedora upstream from what I gather
    Yeah I really should do that eventually - probably when I start having solutions or commits done to 'work in progress' stuff
     
  11. KlueMaster

    KlueMaster Member

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    Reading the entire thread, I think it would be unwise for me to upgrade to centos 8. Also, feels like it may eventually be merged back to redhat in a few versions, or at least require paid support / upfrades.

    Large memory requirements simply make it no go for VPS. And, I'm assuming any speed advantages it offers is already available to us via CMM.
     
  12. eva2000

    eva2000 Administrator Staff Member

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    There will still be speed advantages of CentOS 8 over CentOS 7 for Centmin Mod as CentOS 8 uses newer version of glibc 2.28 vs CentOS 7 glibc 2.17 which is one software I wish I could update on CentOS 7 but can't as it ties in with every yum package on the server so updating it manually will break CentOS 7.

    But yes larger memory requirements for CentOS 8 don't seem to be appealing for lower end users. Doesn't bother me much as most my VPS servers are 2-8GB memory these days and dedicated servers are at least 16-32GB.

    But as you can read form above, alot of CentOS 8 road blockers for Centmin Mod compatibility require waiting on other folks to catch up i.e. CSF Firewall and nftables support, missing packages in 3rd party YUM and native YUM repositories i.e. opendkim for addons/opendkim.sh etc. Not to mention bug in official MariaDB.org YUM repo not show MariaDB-server YUM package so can't install it.
     
  13. pdinh97qng

    pdinh97qng Member

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    :ROFLMAO: I will stick with Centos 7 until Centmind Mod is ready for Centos 8 :coffee: Centos 8 may be better than Centos 7 but for me, without Centmin Mod is worst.
     
  14. robert syputa

    robert syputa Member

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    Great news. Thanks for all the information. Centos 8 looks like a leap forward... I may have to think better of it.

    Side note: One of the most exciting developments in cloud network-server and mobile Wireless Radio Access Network, WRAN, is CAN, Content Addressable Network. CAN assigns a URL to content. The content hash is used to derive the URL, thus providing a mechanism for copyright and intellectual property protection as well.

    This creates a new paradigm in how applications and content can be treated in order to reduce distance, time, and network routing resources needed. Latency is reduced while reliability through multiple sourcing of data based on performance.

    Content can be a graphic media file. Or it can be any content that the application finds a benefit to modularise. Content could be a modularised product description with embedded graphics and distribution rules for example. A Wordpress ap such as Woocommerce could use such modularised product content. Or a service could be modularised so that it is populated on multiple sites. That can be done without using CAN. With CAN the content could reside closer to users.

    The network and 3GPP WRAN standards include CAN and distributed virtualisation that allows CAN content to reside within smallcell network nodes and on end user mobile and fixed devices.

    That sets up interesting possibilities. Imagine this: Your service includes video, product pages, or social network user generated content. Algorithms determine that some content is ranked (or paid for) higher QOS, quality of service. The hot content, that which is popular and timely, is therefore stored within the cache SSD of the smallcell that is located on the utility pole on the street. The most highly ranked content is stored on local users mobile phones. While that has some impact on the battery usage and storage on the device, over the years the impact has become marginal.

    The impact on gaming, social networks, online shops, the CMS software platforms... most applications will be significant.
     
  15. buik

    buik “Life is trying things to see if they work.” Premium Member

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    CentOS 8 won't make a lot of difference, Centminmod wise.

    You get the biggest difference EL7 < EL8 with large, complex machines with complex calculations.
    Simple web servers will not gain much benefit.

    After all, the biggest stumbling block (delaying factor) remains the connection of the website user.
    HTTP/3 support
    can contribute to this, but because it can run on both EL7 and EL8, the difference will also be minimal.
     
  16. eva2000

    eva2000 Administrator Staff Member

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  17. buik

    buik “Life is trying things to see if they work.” Premium Member

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    You are already running the latest non EL upstream Mariadb 10.3 version etc on Centminmod so the results in the link that you send (based on upstream EL7 Mariadb 5.5 vs upstream EL8 Mariadb 10.3) are different and distorted.

    Because Centminmod has already been fully optimized in the positive sense of the word. The difference will be smaller.
     
  18. eva2000

    eva2000 Administrator Staff Member

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    indeed true. so we shall see eventually :)
     
  19. eva2000

    eva2000 Administrator Staff Member

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    Looking at Redhat 8 and CentOS 8 minimum memory requirements, looks like that 2GB is just being overly cautious maybe ? Appendix B. System requirements reference Red Hat Enterprise Linux 8 | Red Hat Customer Portal