Helpful Tricks

VCB v4 Release
VCB v3 End of Support/Life
Best way to install the VCB ISO
I want to use a DELL server, any issues ?
I have Ubiquity devices and the traffic seems not correct
The VCB says I need more RAM
How to improve IPC performance ?
The VCB seems slow in surfing Internet
Can I use Video Resolution Locker with 240p limitation ?
A website seems not optimized, what can I do ?
Is RAID ok with the VCB ?
One or two NICs, what to choose ?
What about SSH access ?
Can I use multi routers to a single VCB ?
My Cache Disks are full, what can I do ?
VCB v4 Release
What about the new v4:
  • Based on the latest Debian 10, 64 bits
  • New Cache engine, 40% faster comparing to the version 3
  • New Cache disks will be XFS, existing will stay EXT4
  • Internal Speedtest server
  • Netdata implemented
  • Compatible Redis server, v4 can now use a remote Redis
  • Network - DNS Balacing is now round robin
Download: VideoCacheBox 4.4521
VCB v3 End of Support/Life
  • End of support: january 1st, 2020
  • End of life: april 1st, 2020
Best way to install the VCB ISO
We advise you to remove all disks you plan as cache and keep the disk for OS plugged.
Once the ISO installed, you can then plug cache disks, the VCB will detect, format and mount all disks to be used as cache.
Before you plug all disks, verify they are free of partitions. If existing partitions the VCB will not use them.
I want to use a DELL server, any issues ?
Latest DELL servers use the module named PERC.
This module (from Bios) manages hard disks and could make troubles during the VCB installation (ex: disks not detected). You will have to read DELL documentation to correctly use the PERC module.
I have Ubiquity devices and the traffic seems not correct
Previous Ubiquity firmware has a vulnerability, we advise you to read this FAQ and apply right action:
http://community.ubnt.com/t5/airMAX-Updates-Blog/Important-Security-Notice-and-airOS-5-6-5-Release/ba-p/1565949
Once the solution applied your traffic will be much better.
The VCB says I need more RAM
The VCB is based on the SQUID cache engine, you must respect SQUID requirements regarding RAM: 14MB RAM for 1GB cache disk.
Quick calculation is this way: 14 x total disks size in TB.
ex: your server is 8TB total disks size, so 14x8=112GB RAM is the requirement.
How to improve IPC performance ?
You can improve IPC by adding one or more SSD to your server.
The server can have one SSD as the OS disk and additional SSDs with the IPC, the VCB will detect this hardware config and will dedicate those new SSDs with the IPC only.
IPC is very nice feature for saving Aborted (canceled) objects the users have visited, we advise you to use IPC to improve your % Byte saving.
If you add more normal disks (SATA/SAS), the VCB will use them as cache disks.
The VCB seems slow in surfing Internet
The first part for a quick surf is to use good Domain Name Servers (aka. DNS)
We advise you to select your own DNS as primary resolvers with VCB settings. If you don't have internal DNS, configure and use your router as primary DNS. If you cannot use your router as DNS then use DNS IPs from your provider.
You can also use Google DNS (8.8.8.8 and 8.8.4.4), name resolutions will be good but depending your location they could be slow.
Also, keep in mind that a good and fast DNS is 30-35ms latency maximum, by using your own DNS you should get 0-2ms.
Can I use Video Resolution Locker with 240p limitation ?
You can use Video Resolution Locker in 240p limitation but you must take care this low resolution could disturb some web sites like xvideos.com, etc...
Actualy, some web sites do not like to be "restricted" in term of resolution and could fail in playing videos, we advise you to test from your side then use 240p or an upper resolution in case of issues.
A website seems not optimized, what can I do ?
The VCB uses dedicated and generic patterns to optimize websites but there are tons of new websites every day.
If you face a website is not optimized yet, feel free to contact us (About) with details and our R&D will improve VCB engines.
Is RAID ok with the VCB ?
No, it's highly NOT recommended to use RAID with a proxy cache because disk I/O will be slower comparing to a normal configuration.
You must configure the hardware/Bios to be sure the VCB will see each hard disk as a single disk.
One or two NICs, what to choose ?
The 2 NICs configuration (gateway/bridge mode) has no advantage as the VCB is able to work in Transparent Proxy (tproxy) with 1 NIC only.
Before selecting the 2 NICs mode, we advise you to try the normal 1 NIC configuration (compatible tproxy mikrotik/cisco and interception mode).
What about SSH access ?
The VCB is a black-box, it means you cannot access the server in SSH. The access is for the UnveilTech Support team only.
Can I use multi routers to a single VCB ?
No, this is not possible.
You will face routing problems if you use many routers going to a single VCB. If you need to cache the traffic with multi routers you need to install at least one VCB per router.
My Cache Disks are full, what can I do ?
If you Cache Disks are full you have 2 solutions:
1. You do nothing, the VCB will clean older objects and will use the freed space with new objects.
2. You plug additional hard disks but you check your RAM is big enough to support new disks.