FanM

Hi friend! Need some help with postfix settings. Here is the situation. i have 2 servers, 1 with fully configured mail with postfix and dovecot. Another one with web server apache2 and just postfix (for sending the mail messages through the php mail function). Have a public static ip address. So when i need to send a message from server 2 to email that located on mail service 1, i am getting timeout error message. In fact in log i can see, that server 2 looking in dns for MX and then going to ip address that filled under A on port 25. So my ip is going to my ip:25. How can i give my postfix on server 2 the instructions to connect to server 1 directly in my private network, not use the global dns?

Thanks friend, i will try that. And i am not blaiming Igor's creation. Big thanks to Igor for that work! P.S.: how to check I/O random?

All you wrote is totally clear for me. But checking the real capacity and exact speed is not what we need in this case. As i told before, that cards perfectly works with wheezy. That situation is only with jessie. And as i told you that problem only with UHS-I versions. Yes, you told that there is a lot of fake cards all around. I am using original Kingston and A-Data, both UHS-I. Their write and read speed maybe not as should be in theory, but not less than class 4 for sure. That 4gb card, what i mentioned, is cheapest and slowest and anyway cannot be faster than class10UHS with any quality. As i told before both cards from different suppliers gives absolutelly the same results. And UHS-I, by the way, use absolutelly another chip than sdhc cards.

Friends, hi again! First of all, thanks to everyone for help. Special thanks for f3 and sysstat stuff. Here is my strange and suspicious results. I have tested that image for next cards this time: 2Gb not SDHC, 4Gb SDHC class 2, 8Gb SDHC class 10, 16Gb class 10 UHS-I (2 brands). Wrote the same image on all that cards and ran upgrade procedure. On 16Gb class 10 UHS-I (the one i used before posted the question) with 2 brand names, and on 2 Gb with NO sdhc, that procedure takes 15-17 minutes. On 4gb and 8gb it takes about 6-7 minutes!!! Iostat 5 when unpacking deb packets allways show big iowait (about 40%) in all cases. But when running on 4 and 8 gb the Write statistics show speed about 2-3mb. In case with 2 and 16gb it is 500-800kb. F3 write statistic: 2gb - 3.78, 4gb - 4.3, 8gb - 4.2, 16gb - 6.9 (tested with /var directory) Reading speed good on all cards. Here is the thing. 16gb class 10 UHS-I with unpacking packets process works the same slow as slowest 2gb card. Do not know what else to do.

That info took when installing gdebi software. Totally it itakes 11.5min for installing. I get top info twice when it was unpacking deb packets.

Hmmm, yesturday you told me that 17min is to much for upgrade. But today that operation tooks 35min. and you telling me that it is normal and in fact needs 10+ minutes. I am kinda confused

Igor, hi! R speed is more than 11.5 (can not find faster destination storage) , W speed is 11.5mb/s. I wrote an image jessie 4.2.3. Ran installing mc, ntpdate, and apt-get upgrade Downloading from repository is not a problem, it is fast process everytime. The main thing is that unpacking takes a lot of time. As you can see in log, today that process took 35min. Incredable long time. Preparing to unpack .../linux-headers-next-sunxi_4.81_armhf.deb ... Unpacking linux-headers-next-sunxi (4.81) over (4.5) ... That took about 10 minutes!!! That is all kinda strange. For example, i downloaded a file with size 11M that contain 2519 files. So unpacking that file needs only 5 seconds. Do not know what to do with it. apt.tar.gz

Meanwhile i was trying to find some information on that thing. Found some info about syslog and systemd. Is there any connection between my problem and systemd? Does the systemd writes the log on SD card, but syslog in cache memory?

Hi friends! Here is the situation. Trying the armbian jessie 3.4.109 and 4.2.3. When installing a new soft it takes to much time. For example, when running apt-get upgrade after fresh image install, it takes about 17 minutes. Of course it contain the core update. But that upgrade part on jessie takes about 7min, on wheezy about 3min. The same thing when just install some software, like apache2 or mc. It takes to much time (for mc it takes about 1 min on jessie, about 30sec on wheezy). The same with reloading. It takes about 1min. Situation is the same on both jessie 3.4.109 and 4.2.3 Tried the same with Banana PI. The same thing. I use the fastest SD card. What is your expirience? Any comments?