Rajesh, >Does that mean Ignite cannot scale well against Berkley dB Incase of single node? Could you please clarify, what your question means?
Ignite can scale from a single node to hundreds(or even thousands, I have seen the only cluster of 300 nodes, but this definitely not a limit). It was designed to work as a distrebuted grid. So I think if you will try to compare one node of Ignite with one node of SomeDB, ignite will lose. But you can run 10 ignite nodes and they will be faster then 10 nodes of somedb, furthermore, you can kill nodes and ignite will continue to work, what will happen if a host with Berkley DB crashes? So in case of crash can you transparently switch to other Berkley DB node and continue to work? Ignite is not just SQL DB, Ignite is a distributed data grid, it's strongly consistent and HA database, please make this into account when comparing it with other solutions. Thanks, Mike. 2018-02-05 9:23 GMT-08:00 Rajesh Kishore <[email protected]>: > Hi Christos > > Does that mean Ignite cannot scale well against Berkley dB Incase of > single node? > > Regards > Rajesh > > On 5 Feb 2018 10:08 p.m., "Christos Erotocritou" <[email protected]> > wrote: > >> Hi Rajesh, >> >> Ignite is a distributed system, testing with one node is really not the >> way. >> >> You need to consider having multiple nodes and portion and collocate your >> data before. >> >> Thanks, >> C >> >> On 5 Feb 2018, at 16:36, Rajesh Kishore <[email protected]> wrote: >> >> Hi, >> >> We are in the process of evaluating Ignite native persistence against >> berkely db. For some reason Ignite query does not seem to be performant the >> way application code behaves against berkley db >> >> Background: >> Berkley db - As of now, we have berkley db for our application and the >> data is stored as name value pair as byte stream in the berkley db's native >> file system. >> >> Ignite DB - We are using Ignite DB's native persistence file system. >> Created appropriate index and retrieving data using SQL involving multiple >> joins. >> >> Ignite configuration : with native persistence enabled , only one node >> >> Data: As of now in the main table we have only *.1 M records *and in >> supporting tables we have around 2 million records >> >> Ignite sql query used >> >> SELECT f.entryID,f.attrName,f.attrValue, f.attrsType FROM >> ( select st.entryID,st.attrName,st.attrValue, st.attrsType from >> (SELECT at1.entryID FROM "objectclass".Ignite_ObjectClass >> at1 WHERE at1.attrValue= ? ) t >> INNER JOIN >> "Ignite_DSAttributeStore".IGNITE_DSATTRIBUTESTORE st ON >> st.entryID = t.entryID WHERE st.attrKind IN ('u','o') >> ) f >> INNER JOIN (SELECT entryID from "dn".Ignite_DN where parentDN like ? >> ) dnt ON f.entryID = dnt.entry >> >> The corresponding EXPLAIN PLAN >> >> >> >> [[SELECT >> F__Z3.ENTRYID AS __C0_0, >> F__Z3.ATTRNAME AS __C0_1, >> F__Z3.ATTRVALUE AS __C0_2, >> F__Z3.ATTRSTYPE AS __C0_3 >> FROM ( >> SELECT >> ST__Z2.ENTRYID, >> ST__Z2.ATTRNAME, >> ST__Z2.ATTRVALUE, >> ST__Z2.ATTRSTYPE >> FROM ( >> SELECT >> AT1__Z0.ENTRYID >> FROM "objectclass".IGNITE_OBJECTCLASS AT1__Z0 >> WHERE AT1__Z0.ATTRVALUE = ?1 >> ) T__Z1 >> INNER JOIN "Ignite_DSAttributeStore".IGNITE_DSATTRIBUTESTORE ST__Z2 >> ON 1=1 >> WHERE (ST__Z2.ATTRKIND IN('u', 'o')) >> AND (ST__Z2.ENTRYID = T__Z1.ENTRYID) >> ) F__Z3 >> /* SELECT >> ST__Z2.ENTRYID, >> ST__Z2.ATTRNAME, >> ST__Z2.ATTRVALUE, >> ST__Z2.ATTRSTYPE >> FROM ( >> SELECT >> AT1__Z0.ENTRYID >> FROM "objectclass".IGNITE_OBJECTCLASS AT1__Z0 >> WHERE AT1__Z0.ATTRVALUE = ?1 >> ) T__Z1 >> /++ SELECT >> AT1__Z0.ENTRYID >> FROM "objectclass".IGNITE_OBJECTCLASS AT1__Z0 >> /++ "objectclass".OBJECTCLASSNDEXED_ATTRVAL_IDX: ATTRVALUE = >> ?1 ++/ >> WHERE AT1__Z0.ATTRVALUE = ?1 >> ++/ >> INNER JOIN "Ignite_DSAttributeStore".IGNITE_DSATTRIBUTESTORE ST__Z2 >> /++ "Ignite_DSAttributeStore".IGNITE_DSATTRIBUTESTORE_ENTRYID_IDX: >> ENTRYID = T__Z1.ENTRYID ++/ >> ON 1=1 >> WHERE (ST__Z2.ATTRKIND IN('u', 'o')) >> AND (ST__Z2.ENTRYID = T__Z1.ENTRYID) >> */ >> INNER JOIN ( >> SELECT >> __Z4.ENTRYID >> FROM "dn".IGNITE_DN __Z4 >> WHERE __Z4.PARENTDN LIKE ?2 >> ) DNT__Z5 >> /* SELECT >> __Z4.ENTRYID >> FROM "dn".IGNITE_DN __Z4 >> /++ "dn".EP_DN_IDX: ENTRYID IS ?3 ++/ >> WHERE (__Z4.ENTRYID IS ?3) >> AND (__Z4.PARENTDN LIKE ?2): ENTRYID = F__Z3.ENTRYID >> */ >> ON 1=1 >> WHERE F__Z3.ENTRYID = DNT__Z5.ENTRYID >> ORDER BY 1], [SELECT >> __C0_0 AS ENTRYID, >> __C0_1 AS ATTRNAME, >> __C0_2 AS ATTRVALUE, >> __C0_3 AS ATTRSTYPE >> FROM PUBLIC.__T0 >> /* "Ignite_DSAttributeStore"."merge_sorted" */ >> ORDER BY 1 >> /* index sorted */]] >> >> >> Any pointers , how should I proceed , Following is the JFR report for the >> code used >> cursor = cache.query(new SqlFieldsQuery(query).setEnforceJoinOrder(true); >> cursor.getAll(); >> >> >> <image.png> >> >> >> >> Thanks, >> Rajesh >> >> >>
