Re: [CentOS] Optimum Block Size to use

2015-08-19 Thread John Hodrien
On Wed, 19 Aug 2015, Jatin Davey wrote: Hi All We use CentOS 6.6 for our application. I have profiled the application and find that we have a heavy requirement in terms of Disk writes. On an average when our application operates at a certain load i can observe that the disk writes / second i

[CentOS] CentOS 7 PV kernel

2015-08-19 Thread Venkateswara Rao Dokku
HI, Is the CentOS 7 PV kernel available? I installed latest CentOS 7 & I found out that it is a HVM guest. So, if we wanted to have CentOS PV guest for CentOS 7, is there any specific steps to follow? or the same kernel will work as both PV & HVM? -- Thanks & Regards, Venkateswara Rao Dokku. __

Re: [CentOS] Optimum Block Size to use

2015-08-19 Thread Leon Fauster
Am 19.08.2015 um 10:24 schrieb John Hodrien : > On Wed, 19 Aug 2015, Jatin Davey wrote: > >> Hi All >> >> We use CentOS 6.6 for our application. I have profiled the application and >> find that we have a heavy requirement in terms of Disk writes. On an average >> when our application operates a

[CentOS] [OT] C7 and php mkdir

2015-08-19 Thread Alessandro Baggi
Hi list, I've a problem using PHP mkdir() with apache on C7. I'm trying to create a directory under a specified directory in the tree of my vhost, and mkdir create this directory but when I try to create a file in this dir I get error on permission. For directory creation I use permission 0777 f

[CentOS] Firewalld broken on Centos7?

2015-08-19 Thread Andrew Holway
Hi, I have a standard Centos7 AMI. Can anyone tell me whats happening here? Thanks, Andrew Aug 19 11:17:23 master dhclient[22897]: bound to 10.141.10.49 -- renewal in 1795 seconds. Aug 19 11:17:24 master network: Determining IP information for eth0... done. Aug 19 11:17:24 master network: [ OK

[CentOS] CentOS-announce Digest, Vol 126, Issue 9

2015-08-19 Thread centos-announce-request
Send CentOS-announce mailing list submissions to centos-annou...@centos.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.centos.org/mailman/listinfo/centos-announce or, via email, send a message with subject or body 'help' to centos-announce-requ..

Re: [CentOS] CentOS 7 PV kernel

2015-08-19 Thread Peter
On 08/19/2015 09:46 PM, Venkateswara Rao Dokku wrote: > Is the CentOS 7 PV kernel available? > I installed latest CentOS 7 & I found out that it is a HVM guest. > > So, if we wanted to have CentOS PV guest for CentOS 7, is there any > specific steps to follow? > or the same kernel will work as bot

[CentOS] TLS for all CentOS websites but not for smtp?

2015-08-19 Thread Kai Bojens
Hello everybody, I just got the email about the enforcing of HTTPS for the CentOS Websites which I really appreciate: „The CentOS Project infra team has decided to implement TLS wherever we can (…)” Does anybody know if and when mail.centos.org will be able to deliver its mails with STARTTLS? Th

Re: [CentOS] [OT] C7 and php mkdir

2015-08-19 Thread Leon Fauster
Am 19.08.2015 um 13:54 schrieb Alessandro Baggi : > Hi list, > I've a problem using PHP mkdir() with apache on C7. > I'm trying to create a directory under a specified directory in the tree of > my vhost, and mkdir create this directory but when I try to create a file in > this dir I get error on

[CentOS] shared memory - shmmax - shmall - page_size

2015-08-19 Thread Michael H
Hi List, I'm tuning up a new database server and I'm finding very mixed information online. Here are the default shmmax and shmall from my new system cat /proc/sys/kernel/shmmax 4294967295 cat /proc/sys/kernel/shmall 268435456 SHMALL is close enough to being SHMMAX / 16. Now, everything I'

Re: [CentOS] TLS for all CentOS websites but not for smtp?

2015-08-19 Thread Alice Wonder
On 08/19/2015 06:56 AM, Kai Bojens wrote: Hello everybody, I just got the email about the enforcing of HTTPS for the CentOS Websites which I really appreciate: „The CentOS Project infra team has decided to implement TLS wherever we can (…)” Does anybody know if and when mail.centos.org will b

Re: [CentOS] Optimum Block Size to use

2015-08-19 Thread Jatin Davey
On 8/19/2015 1:54 PM, John Hodrien wrote: On Wed, 19 Aug 2015, Jatin Davey wrote: Hi All We use CentOS 6.6 for our application. I have profiled the application and find that we have a heavy requirement in terms of Disk writes. On an average when our application operates at a certain load i

Re: [CentOS] Optimum Block Size to use

2015-08-19 Thread Jatin Davey
On 8/19/2015 4:17 PM, Leon Fauster wrote: Am 19.08.2015 um 10:24 schrieb John Hodrien : On Wed, 19 Aug 2015, Jatin Davey wrote: Hi All We use CentOS 6.6 for our application. I have profiled the application and find that we have a heavy requirement in terms of Disk writes. On an average when

Re: [CentOS] TLS for all CentOS websites but not for smtp?

2015-08-19 Thread Kai Bojens
On 19-08-15 08:30:27, Alice Wonder wrote: > e-mail by its very design is not secure, SMTP creates "Man In The > Middle" at every server along the way. DANE exists and mail servers like postfix support this. My logfiles show me that mail.centos.org delivers straight to me without any servers alon

Re: [CentOS] Firewalld broken on Centos7?

2015-08-19 Thread Chris Murphy
On Wed, Aug 19, 2015 at 5:54 AM, Andrew Holway wrote: > Hi, > > I have a standard Centos7 AMI. Can anyone tell me whats happening here? > > Thanks, > > Andrew > Aug 19 11:17:23 master dhclient[22897]: bound to 10.141.10.49 -- renewal in > 1795 seconds. > Aug 19 11:17:24 master network: Determining

Re: [CentOS] TLS for all CentOS websites but not for smtp?

2015-08-19 Thread Alice Wonder
On 08/19/2015 09:24 AM, Kai Bojens wrote: On 19-08-15 08:30:27, Alice Wonder wrote: e-mail by its very design is not secure, SMTP creates "Man In The Middle" at every server along the way. DANE exists and mail servers like postfix support this. My logfiles show me that mail.centos.org deliv

Re: [CentOS] Optimum Block Size to use

2015-08-19 Thread Michael Hennebry
On Wed, 19 Aug 2015, Jatin Davey wrote: On 8/19/2015 1:54 PM, John Hodrien wrote: On Wed, 19 Aug 2015, Jatin Davey wrote: We use CentOS 6.6 for our application. I have profiled the application and find that we have a heavy requirement in terms of Disk writes. On an average when our applicat

Re: [CentOS] Optimum Block Size to use

2015-08-19 Thread Chris Murphy
On Tue, Aug 18, 2015 at 9:38 PM, Jatin Davey wrote: > I have a few queries with respect to the block size being set in the system: > > 1. Is 4k the optimum block size considering the amount of writes / second > the application performs ? > > 2. How do i find out the optimum block size given the a

Re: [CentOS] Optimum Block Size to use

2015-08-19 Thread Chris Murphy
On Wed, Aug 19, 2015 at 4:47 AM, Leon Fauster wrote: > furthermore check the fs alignment with > the underlying disk ... This is very important. Certain workloads and certain AF drive firmware can really suck when there's a lot of read,modify,write done by the drive (internally) if the fs block

Re: [CentOS] TLS for all CentOS websites but not for smtp?

2015-08-19 Thread Ned Slider
On 19/08/15 17:50, Alice Wonder wrote: > > > On 08/19/2015 09:24 AM, Kai Bojens wrote: >> On 19-08-15 08:30:27, Alice Wonder wrote: >> >>> e-mail by its very design is not secure, SMTP creates "Man In The >>> Middle" at every server along the way. >> >> DANE exists and mail servers like postfix

[CentOS] Centos7 Kernel Panic

2015-08-19 Thread Sachin Gupta
Hello Everyone, I have prepared following isolinux.cfg. default linux label linux kernel /vmlinuz append initrd=/initrd.gz But kernel panics with the standard message 'Kernel panic - not syncing: No init found'. Linux kernel version is 3.10. I tried to read the init.txt too.But could not fi

Re: [CentOS] TLS for all CentOS websites but not for smtp?

2015-08-19 Thread Kai Bojens
On 19-08-15 19:02:51, Ned Slider wrote: > I can understand why you may want to send some mail encrypted point to > point, but not when you then publish said mail on a publicly accessible > archived list. It's just adding unnecessary overhead. No, it's making the job harder for the mentioned thir

Re: [CentOS] Centos7 Kernel Panic

2015-08-19 Thread Gordon Messmer
On 08/19/2015 11:20 AM, Sachin Gupta wrote: I have prepared following isolinux.cfg. default linux label linux kernel /vmlinuz append initrd=/initrd.gz But kernel panics with the standard message 'Kernel panic - not syncing: No init found'. You haven't told Linux where to find a root fil

Re: [CentOS] Centos7 Kernel Panic

2015-08-19 Thread Leon Fauster
Am 19.08.2015 um 20:20 schrieb Sachin Gupta : > I have prepared following isolinux.cfg. > > default linux > label linux > kernel /vmlinuz > append initrd=/initrd.gz > > But kernel panics with the standard message 'Kernel panic - not syncing: No > init found'. > Linux kernel version is 3.10. >

Re: [CentOS] TLS for all CentOS websites but not for smtp?

2015-08-19 Thread Leon Fauster
Am 19.08.2015 um 20:02 schrieb Ned Slider : > > > On 19/08/15 17:50, Alice Wonder wrote: >> >> >> On 08/19/2015 09:24 AM, Kai Bojens wrote: >>> On 19-08-15 08:30:27, Alice Wonder wrote: >>> >>> >>> DANE exists and mail servers like postfix support this. My logfiles >>> show me that mail.cento

Re: [CentOS] TLS for all CentOS websites but not for smtp?

2015-08-19 Thread Fabian Arrotin
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 19/08/15 15:56, Kai Bojens wrote: > Hello everybody, I just got the email about the enforcing of HTTPS > for the CentOS Websites which I really appreciate: > > „The CentOS Project infra team has decided to implement TLS > wherever we can (…)” > >

Re: [CentOS] Centos7 Kernel Panic

2015-08-19 Thread Sachin Gupta
Guys, I am a newbie. I am trying to load kernel from a DVD. How do I figure out where my root filesystem mounted ? Thanks Sachin On Wed, Aug 19, 2015 at 11:51 AM, Gordon Messmer wrote: > On 08/19/2015 11:20 AM, Sachin Gupta wrote: > >> I have prepared following isolinux.cfg. >> >> default linu

Re: [CentOS] TLS for all CentOS websites but not for smtp?

2015-08-19 Thread Kai Bojens
On 19-08-15 21:33:59, Fabian Arrotin wrote: > My (personal) opinion is "if you want to secure/encrypt", use gpg. That's right if you want to hide the content. But this leaves the metadata of the communication clear to see for third parties. Using transport encryption is the only way to at least

Re: [CentOS] Update from 6.6 to 6.7 > automount logs error message

2015-08-19 Thread Michael Sanderson
Phelps, Matthew writes: > > On Tue, Aug 11, 2015 at 10:55 AM, Ralf Aumüller < > Ralf.Aumueller informatik.uni-stuttgart.de> wrote: > > > Hello, > > > > after an update from 6.6 to 6.7 the following error message is logged to > > /var/log/messages when I login (per ssh): > > > > Aug 11 16:31:21

[CentOS] Fwd: ABRT Daemon/sosreport disaster

2015-08-19 Thread Robert Inder
On Sunday, I did a "yum update" which installed kernel 2.6.32-573.3.1.el6.i686 on half a dozen virtual machines running CentOS 6.7. Since then, two of them have gone into "meltdown", and started spewing "ABRT Daemon" emails: one on Tuesday, and one tonight. The machines have a very light workload

Re: [CentOS] Fwd: ABRT Daemon/sosreport disaster

2015-08-19 Thread Ulf Volmer
Am 20.08.2015 um 02:31 schrieb Robert Inder: > backtrace: > :abrt-action-generate-machine-id:24::ImportError: No module > named argparse Maybe you will find the following link helpful: https://bugzilla.redhat.com/show_bug.cgi?id=1246539 regrads Ulf

Re: [CentOS] Grub legacy on Centos 7

2015-08-19 Thread Ian Pilcher
On 08/16/2015 04:18 PM, Sachin Gupta wrote: We have centos6 server. And we are planning to upgrade it to Centos7.And GRUB 2 needs a new bios grub partition. Creating a new partition is too much risky. I am wondering if it is possible to replace Grub2 with Grub legacy on Centos7 machine? It is

Re: [CentOS] CentOS 7 PV kernel

2015-08-19 Thread Venkateswara Rao Dokku
Thanks for the reply. How to know that the CentOS 7 kerenel is whether PV or HVM? When I searched about it, I found the following link, where the kernel type us determined from the 2 following commands 1. uname -r 2. lsmod | grep xen If both have "*xen*", then it is PV, if

Re: [CentOS] CentOS 7 PV kernel

2015-08-19 Thread John R Pierce
On 8/19/2015 9:50 PM, Venkateswara Rao Dokku wrote: How to know that the CentOS 7 kerenel is whether PV or HVM? you've asked this a bunch of times and have been told over and over, IT SUPPORTS BOTH. if you run c7 in a HVM, it will run as a HVM system. if you run it in a paravirtualized env