Recent content by jai_123

I am answering to my question to document the knowledge in public. You can use lvs -a to view details of metadata and pmspare To extend metadata lvextend -L+128M volgroup1/lv1_tmeta You will see lvol0_pmspare (metadata spare) remains original size even after above command is successful...

I am very new to Thin LVM. Learned there are lot of chances for metadata corruption issue if exhaust the metadata space in Thin LVM. My logical volume looks as below: [root@srv ~]# lvs LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert lv1 volgroup1...

I am wondering do any one have a real benchmark on SSD with 'write cache' enabled and disabled. Are there any SSD with NO internal buffer/cache mechanism (write cache enabled / disabled will not make any impact). Do the write cache enabling impact the write / overall performance of system heavily ?

Thank you for the prompt responses and suggestions. In case of HW RAID Controller Card should we choose a card with on-card cache w/ battery back-up ? Or a normal LSI card w/o cache. I came across "LSI MegaRAID SATA/SAS 9260-4i 6Gb/s PCI-Express 2.0 w/ 512MB onboard memory", it have a DDR II...

I am currently using Supermicro X11SSH-F with Intel E3-1230 v5 processor (1U Chassis). Currently I have OS based RAID 1 (2 x SSDs). I am planning to run virtualization on this server (Host OS CentOS 7) and may move to RAID 10 (No plan for RAID 5/6). Please recommend a cheap HW RAID controller...

Thanks for all the prompt responses and suggestions, They are indeed very helpful. As suggested I think the main advantage of enterprise SSD will be full power loss protection along with encryption possibilities. Surprisingly I cannot see much difference in Endurance. Considering 500GB SSD for...

I am wondering can we use a normal note/desktop SSD on a server in RAID 1. Samsung 850 Pro Crucial MX200 Transcend SSD370 SanDisk Extreme Pro I understand consumer level ssd's could be less reliable on heavy duty professional use. But what is you suggestion using similar SSD's on light load...

Do you suggest using SSD370 on a RAID 1 ? I am planning to create a RAID 1, not yet finalized to choose a OS based RAID or use a cheap HW RAID adapter.

Thank you very much for your suggestions. As suggested in case of on-board RAID malfunction, it may be difficult to get same motherboard replacement, as most of the manufacturers discontinue the motherboard after a year or two. I think the OS RAID 1 will be best for me considering the...

I am planning to setup a server with Supermicro X11SSL-F with 2 SSD (Intel S3510) on RAID 1. My objective is to create VM (KVM based) out of the node (node OS: CentOS 6.7 preferred). The motherboard support RAID 0, 1 and 10 via C232 controller. OS Compatibility Chart...

Can some one please guide me on performance, advantage / disadvantage. 1. Creating SSD RAID 1 using an onboard SATA3 ( via C232 / C236 ) controller on latest Motherboard Like Supermicro X11 series. 2. Creating SSD RAID 1 Using a RAID adapter (Zero Memory) on similar motherboard. I understand...