Hi Yaron: This is the filesystem:
[root@cl005 net]# mmlsdisk work disk driver sector failure holds holds storage name type size group metadata data status availability pool ------------ -------- ------ ----------- -------- ----- ------------- ------------ ------------ nsd_a_7 nsd 512 -1 No Yes ready up system nsd_b_7 nsd 512 -1 No Yes ready up system nsd_c_7 nsd 512 -1 No Yes ready up system nsd_d_7 nsd 512 -1 No Yes ready up system nsd_a_8 nsd 512 -1 No Yes ready up system nsd_b_8 nsd 512 -1 No Yes ready up system nsd_c_8 nsd 512 -1 No Yes ready up system nsd_d_8 nsd 512 -1 No Yes ready up system nsd_a_9 nsd 512 -1 No Yes ready up system nsd_b_9 nsd 512 -1 No Yes ready up system nsd_c_9 nsd 512 -1 No Yes ready up system nsd_d_9 nsd 512 -1 No Yes ready up system nsd_a_10 nsd 512 -1 No Yes ready up system nsd_b_10 nsd 512 -1 No Yes ready up system nsd_c_10 nsd 512 -1 No Yes ready up system nsd_d_10 nsd 512 -1 No Yes ready up system nsd_a_11 nsd 512 -1 No Yes ready up system nsd_b_11 nsd 512 -1 No Yes ready up system nsd_c_11 nsd 512 -1 No Yes ready up system nsd_d_11 nsd 512 -1 No Yes ready up system nsd_a_12 nsd 512 -1 No Yes ready up system nsd_b_12 nsd 512 -1 No Yes ready up system nsd_c_12 nsd 512 -1 No Yes ready up system nsd_d_12 nsd 512 -1 No Yes ready up system work_md_pf1_1 nsd 512 200 Yes No ready up system jbf1z1 nsd 4096 2012 No Yes ready up sas_ssd4T jbf2z1 nsd 4096 2012 No Yes ready up sas_ssd4T jbf3z1 nsd 4096 2012 No Yes ready up sas_ssd4T jbf4z1 nsd 4096 2012 No Yes ready up sas_ssd4T jbf5z1 nsd 4096 2012 No Yes ready up sas_ssd4T jbf6z1 nsd 4096 2012 No Yes ready up sas_ssd4T jbf7z1 nsd 4096 2012 No Yes ready up sas_ssd4T jbf8z1 nsd 4096 2012 No Yes ready up sas_ssd4T jbf1z2 nsd 4096 2012 No Yes ready up sas_ssd4T jbf2z2 nsd 4096 2012 No Yes ready up sas_ssd4T jbf3z2 nsd 4096 2012 No Yes ready up sas_ssd4T jbf4z2 nsd 4096 2012 No Yes ready up sas_ssd4T jbf5z2 nsd 4096 2012 No Yes ready up sas_ssd4T jbf6z2 nsd 4096 2012 No Yes ready up sas_ssd4T jbf7z2 nsd 4096 2012 No Yes ready up sas_ssd4T jbf8z2 nsd 4096 2012 No Yes ready up sas_ssd4T jbf1z3 nsd 4096 2034 No Yes ready up sas_ssd4T jbf2z3 nsd 4096 2034 No Yes ready up sas_ssd4T jbf3z3 nsd 4096 2034 No Yes ready up sas_ssd4T jbf4z3 nsd 4096 2034 No Yes ready up sas_ssd4T jbf5z3 nsd 4096 2034 No Yes ready up sas_ssd4T jbf6z3 nsd 4096 2034 No Yes ready up sas_ssd4T jbf7z3 nsd 4096 2034 No Yes ready up sas_ssd4T jbf8z3 nsd 4096 2034 No Yes ready up sas_ssd4T jbf1z4 nsd 4096 2034 No Yes ready up sas_ssd4T jbf2z4 nsd 4096 2034 No Yes ready up sas_ssd4T jbf3z4 nsd 4096 2034 No Yes ready up sas_ssd4T jbf4z4 nsd 4096 2034 No Yes ready up sas_ssd4T jbf5z4 nsd 4096 2034 No Yes ready up sas_ssd4T jbf6z4 nsd 4096 2034 No Yes ready up sas_ssd4T jbf7z4 nsd 4096 2034 No Yes ready up sas_ssd4T jbf8z4 nsd 4096 2034 No Yes ready up sas_ssd4T work_md_pf1_2 nsd 512 200 Yes No ready up system work_md_pf1_3 nsd 512 200 Yes No ready up system work_md_pf1_4 nsd 512 200 Yes No ready up system work_md_pf2_5 nsd 512 199 Yes No ready up system work_md_pf2_6 nsd 512 199 Yes No ready up system work_md_pf2_7 nsd 512 199 Yes No ready up system work_md_pf2_8 nsd 512 199 Yes No ready up system [root@cl005 net]# mmlsfs work -R -r -M -m -K flag value description ------------------- ------------------------ ----------------------------------- -R 2 Maximum number of data replicas -r 2 Default number of data replicas -M 2 Maximum number of metadata replicas -m 2 Default number of metadata replicas -K whenpossible Strict replica allocation option On Mon, Jan 9, 2017 at 3:34 PM, Yaron Daniel <[email protected]> wrote: > Hi > > 1) Yes in case u have only 1 Failure group - replication will not work. > > 2) Do you have 2 Storage Systems ? When using GPFS replication write stay > the same - but read can be double - since it read from 2 Storage systems > > Hope this help - what do you try to achive , can you share your env setup ? > > > > Regards > > > > ------------------------------ > > > > *Yaron Daniel* 94 Em Ha'Moshavot Rd > *Server, **Storage and Data Services* > <https://w3-03.ibm.com/services/isd/secure/client.wss/Somt?eventType=getHomePage&somtId=115>*- > Team Leader* Petach Tiqva, 49527 > *Global Technology Services* Israel > Phone: +972-3-916-5672 <+972%203-916-5672> > Fax: +972-3-916-5672 <+972%203-916-5672> > Mobile: +972-52-8395593 <+972%2052-839-5593> > e-mail: [email protected] > *IBM Israel* <http://www.ibm.com/il/he/> > > > > > > > > From: Brian Marshall <[email protected]> > To: gpfsug main discussion list <[email protected]> > Date: 01/09/2017 10:17 PM > Subject: [gpfsug-discuss] replication and no failure groups > Sent by: [email protected] > ------------------------------ > > > > All, > > If I have a filesystem with replication set to 2 and 1 failure group: > > 1) I assume replication won't actually happen, correct? > > 2) Will this impact performance i.e cut write performance in half even > though it really only keeps 1 copy? > > End goal - I would like a single storage pool within the filesystem to be > replicated without affecting the performance of all other pools(which only > have a single failure group) > > Thanks, > Brian Marshall > VT - ARC_______________________________________________ > gpfsug-discuss mailing list > gpfsug-discuss at spectrumscale.org > http://gpfsug.org/mailman/listinfo/gpfsug-discuss > > > > > _______________________________________________ > gpfsug-discuss mailing list > gpfsug-discuss at spectrumscale.org > http://gpfsug.org/mailman/listinfo/gpfsug-discuss > >
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