# System requirements for 250k tags but only 10 clients max **URL:** \ **Category:** Ignition\ **Created:** [July 28, 2021, 6:44pm UTC](https://forum.inductiveautomation.com/t/system-requirements-for-250k-tags-but-only-10-clients-max/49321 "2021-07-28T18:44:45Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![pieter.deswert](https://avatars.discourse-cdn.com/v4/letter/p/8797f3/32.png) [@pieter.deswert](https://forum.inductiveautomation.com/u/pieter.deswert)\ **Post date:** [July 28, 2021, 6:44pm UTC](https://forum.inductiveautomation.com/t/system-requirements-for-250k-tags-but-only-10-clients-max/49321/1 "2021-07-28T18:44:46Z")
Hi there I am evaluating Ignition for a project I read the guide on speccing the server but my project differs from the numbers there It would comprise of 250k tags of which max 3k would be in historian , all from 1 plc (siemens s7-1518, siemens adressing, plc can handle this load. we already did it with other scada systems) and a maximum of 10 cuncurrent clients For development we would be working with 4 people at the same time Right now a spec of 4 cores and 16 gb of ram on new server hardware is mandated by the client Is this doable ? ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [July 28, 2021, 6:47pm UTC](https://forum.inductiveautomation.com/t/system-requirements-for-250k-tags-but-only-10-clients-max/49321/2 "2021-07-28T18:47:40Z")
Sales engineering is a lot better at answering questions like this. 4 cores might be okay if they are real cores and not virtualized, but 16gb of RAM seems low. You probably want at least 16gb dedicated to just Ignition, possibly more. > [@pieter.deswert](#): > > It would comprise of 250k tags of which max 3k would be in historian , all from 1 plc (siemens s7-1518, siemens adressing, plc can handle this load. we already did it with other scada systems) I don't know what polling rates you have in mind but I'm extremely skeptical about this part. ---
**Author:** ![pieter.deswert](https://avatars.discourse-cdn.com/v4/letter/p/8797f3/32.png) [@pieter.deswert](https://forum.inductiveautomation.com/u/pieter.deswert)\ **Post date:** [July 28, 2021, 6:54pm UTC](https://forum.inductiveautomation.com/t/system-requirements-for-250k-tags-but-only-10-clients-max/49321/3 "2021-07-28T18:54:53Z")
1 sec for most. If there is a reliable way to set a bit in a dword tag the number of tags would go down dramatically. Also is there a way where tags would go to sleep automatically if if they are not requested by a client or script ? 80% are tags that would be used only in popup windows (settings, setpoints and auto/manual/ start/ stop commands) ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [July 28, 2021, 6:56pm UTC](https://forum.inductiveautomation.com/t/system-requirements-for-250k-tags-but-only-10-clients-max/49321/4 "2021-07-28T18:56:36Z")
> [@pieter.deswert](#): > > Also is there a way where tags would go to sleep automatically if if they are not requested by a client or script ? 80% are tags that would be used only in popup windows (settings, setpoints and auto/manual/ start/ stop commands) Yes, it's called "Leased Tags" in Ignition: [Tag Groups - Ignition User Manual 8.1 - Ignition Documentation](https://docs.inductiveautomation.com/display/DOC81/Tag+Groups#TagGroups-Leased) If you're not aware of the limitations when using the S7 protocol with the 1200 or 1500 then see "considerations" here: [Siemens - Ignition User Manual 8.1 - Ignition Documentation](https://docs.inductiveautomation.com/display/DOC81/Siemens). There is no symbolic addressing or browsing, only raw area/offset by manual tag creation. ---
**Author:** ![pieter.deswert](https://avatars.discourse-cdn.com/v4/letter/p/8797f3/32.png) [@pieter.deswert](https://forum.inductiveautomation.com/u/pieter.deswert)\ **Post date:** [July 28, 2021, 6:58pm UTC](https://forum.inductiveautomation.com/t/system-requirements-for-250k-tags-but-only-10-clients-max/49321/5 "2021-07-28T18:58:22Z")
Yes i am used to that limitation 🙂 but we can go arround it by using UDT in the PLC and providing the start adress in the parameters of the ignition UDT