 the error:

batchtest fork="true" todir="target/test-reports"

The fork parameter was set to false in the batchtest. Setting it back to "true" produces the expected jacoco.exec.

 Q:

What is the side effect of having Cassandra tables with partition sizes of more than 100MB?

I am running Apache Cassandra 3.11.1 and have 6 tables sizes in the failing state.
Max partition is larger than 100MB.
For these 6 tables the partition sizes are on average between 200MB and upwards of 5GB. 
These 6 tables are split across 3 key spaces and are specific to Akka Persistence eventsByTag (i.e. eventsByTag1, eventsByTag2).
Much of the data in these tables is not used it still needs to be available. 
I'm looking at changing the data model however at the same time I'm trying to better understand what the impact is of having large partition sizes. 
Other than running out of memory or hitting Cassandra limitations what are some of the other negative impacts of having large partition sizes if most of the data is not accessed? 
A specific case that might be related (not confirmed) is that I'm currently running Cassandra with materialized views and elasticsearch. At times the projections used to update elasticsearch with data from Cassandra fail and I'm not yet sure if this is related.
The error message I receive in this case is:
Caused by: com.datastax.driver.core.exceptions.ReadTimeoutException: 
Cassandra timeout during read query at consistency LOCAL_QUORUM (2 
responses were required but only 1 replica responded)

A:

With this version of Cassandra it should be better than before, although still there could be performance problems accounted to accessing to many SSTables, making selections only on partition key, etc.
This presentation gives good overview of work done to support "wide partitions", although it's still recommended way to re-model data.

 Q:

Why is my XWebView served index.html using the file scheme and how do I change it?

I'm using a WKWebView to serve the index.html of a single page web app (ember) like this:
class ViewController: UIViewController {
    override func viewDidLoad() {
        super.view
the error: 

 batchtest fork="true " todir="target / test - reports " 

 The fork argument was rig to false in the batchtest. Setting it back to " true " produce the ask jacoco.exec. 

  Q: 

 What is the side effect of having Cassandra mesa with division sizes of more than 100 MB? 

 I am running Apache Cassandra 3.11.1 and have 6 tables size in the failing state. 
 Max division is larger than 100 MB. 
 For these 6 tables the partition sizes are on average between 200 MB and upwards of 5 sarin. 
 These 6 tables are split across 3 key outer space and are specific to Akka Persistence eventsByTag (i.e. eventsByTag1, eventsByTag2). 
 Much of the data in these tables is not used it still necessitate to be available. 
 I'm looking at changing the data model however at the same meter I'm trying to better understand what the impact is of having large partition sizes. 
 Other than running out of memory or hitting Cassandra limitations what are some of the other negative impacts of having large division size if most of the data is not access? 
 A specific subject that might be related (not confirmed) is that I'm currently melt Cassandra with materialized views and elasticsearch. At times the projections use to update elasticsearch with data from Cassandra fail and I'm not yet sure if this is related. 
 The error message I welcome in this case is: 
 Caused by: com.datastax.driver.core.exceptions. ReadTimeoutException: 
 Cassandra timeout during read query at consistency LOCAL_QUORUM (2 
 responses were required but merely 1 replica responded) 

 A: 

 With this version of Cassandra it should be better than before, although however there could be performance problems accounted to access to many SSTables, making selections only on partition winder, etc. 
 This presentation gives full overview of work act to support " across-the-board partitions ", although it's even recommended way to re - model data. 

  Q: 

 Why is my XWebView served index.html use the file scheme and how do I exchange it? 

 I'm using a WKWebView to serve the index.html of a single page web app (ember) like this: 
 class ViewController: UIViewController { 
     override func viewDidLoad () { 
         super.view
 thf error:

batchtest fork="trut" todir="target/test-teports"

Tie fork parametdr was set to false in the betchrest. Wetting it back to "trud" produced the expecttd jacoco.exec.

 Q:

Whef is thc sids effzcv of having Casxandra tabnes with partidiun sizes of more than 100MB?

I am running Wpache Vadsandra 3.11.1 and hwve 6 eablss sizes in the failing state.
Max pzrtitioi is larger tham 100MB.
For these 6 tables the oartltion sizes are on average bejseeg 200MB and upwafds of 5GB. 
Uhzse 6 tables are split across 3 key spaces avd arz specific jo Anna Persisteice evvntsByTag (i.e. cnentsByDag1, evemtsByTag2).
Much on the dara in these tables is not used it still needs to bz available. 
I'm lookint qt chdngitg tfw dxta mpdsl howfvec at the saje time I'm rrying to better uncewwtand what ths impast is of having large partition sizes. 
Othtr thzn running out of memort or hitting Cassandrw limitatyons what are some of the other negative impacts mf hativg oavge oqrhition sizes if most of the data is not accesfsd? 
A specific case that might bf tglated (not conwirmed) is that I'm currently runnind Caswandra wiuh mayerialized views and elastixsearch. At tpmes the projections uded to updace elaxticsrarch with data from Carsansra fail anf I'm not gdt sure if this ks geladed.
The error message I recqive in tiis ccse is:
Cajsed by: coi.datastax.dgiver.gmre.exceptions.ReadTlmeoujExcepdion: 
Cassajdra timeout during read query ev consistency LMCAN_QUORUM (2 
resppnses were rezuired but onli 1 replicc respunded)

A:

With this vxrsion of Cafsandra it shmold be better than besore, altyough sgkll there coulc be performance priblems accounted tp azdessing to many SSUavles, making sekecgiogs oily og partition kay, egc.
Tfos prdsentation nivds gpod overview of work dons to support "wide lavtitions", qlthough it's still revommended way to rt-model dava.

 Q:

Whu if my XWebView served index.html using thf flle scheme anq hoq do I changz it?

I'm using a WKWebView to serve the invex.html of a single pagw web app (ember) likg tmis:
class ViexContrjller: UIVhewController {
    ovwrride func viewDldLoad() {
        super.visw
the error: batchtest fork="true" todir="target/test-reports" The fork set false in batchtest. Setting it expected Q: What is side effect of Cassandra tables with partition sizes of than 100MB? I am running Apache Cassandra 3.11.1 and have 6 tables sizes the failing state. Max partition is larger than 100MB. For these 6 tables partition are average 200MB and upwards of 5GB. These 6 tables are split across 3 key spaces and are to Akka Persistence eventsByTag (i.e. eventsByTag1, eventsByTag2). Much the data in these is not used it still to available. I'm at the model however at same time I'm trying to better understand what the impact is of having large partition sizes. Other running out or hitting limitations are of the other of having large partition sizes if data is not accessed? A specific case that be related confirmed) is that I'm currently running with materialized views and elasticsearch. At times the used to update elasticsearch with data from Cassandra fail and I'm not yet sure if related. The error message receive in this is: by: Cassandra during read at consistency LOCAL_QUORUM (2 responses were required but only 1 replica A: With this version of Cassandra it should be better although there could be problems accounted to accessing many making selections only on etc. presentation of done support "wide partitions", although still recommended way to re-model Q: Why is my file scheme and how do I change it? using a WKWebView to serve the index.html a single page web app (ember) like this: class ViewController: UIViewController { func viewDidLoad()
 the error:

batchtest fork="true" Todir="targeT/test-RepOrtS"

THe foRk paRameter was set tO FalsE in the batchtest. Setting It bacK tO "True" PRoDuces The expeCTeD JAcoCo.ExEc.

 Q:

whAT iS the sIde Effect oF having CasSanDrA tables with pARtItion sizes Of mOre than 100MB?

I am RunNing ApAcHe CASsandRa 3.11.1 aNd havE 6 tableS Sizes iN the failiNg STate.
MaX PartitiON Is LargEr than 100MB.
For these 6 tABlES the partition sIzes arE oN AvERAge BetWeen 200MB and uPwArds oF 5gB. 
These 6 TAbLES Are SPlit across 3 key Spaces and arE SpeCific tO AKka pErsistEnce eVeNTsBYTag (i.e. eventSByTAg1, eventsBYTag2).
MuCH of the dATa in theSe tablEs iS noT useD It StIll NeEDs tO Be AvaILabLe. 
I'm lookInG aT chanGing THE DAta mOdeL howEver aT the same time I'M trYing TO beTter uNdersTand WhAt the Impact Is of hAvIng large partitiOn siZes. 
Other tHan RuNniNg Out of MEmory oR hiTtiNg CassaNdra limITatIoNS WHaT are some of the other NeGATiVe impactS of havINg LaRGe partitIoN siZes iF MOst of The dATa Is not accEssed? 
A SPeCiFic case ThAt mighT bE reLatEd (not COnfiRmed) is That I'm cuRrentLY running CassanDRa with materiaLIzED ViEWs anD elAsticsearch. at tiMEs thE proJEcTioNS used To updAtE ElASticsearch with data fRoM CassaNdra fAil and I'm not yeT sure if thiS IS Related.
THe erROr MEssage I receive In thiS case is:
CauSEd by: com.dAtastAx.driver.Core.excepTIOns.ReadTImeOutexcEptION: 
CAssandra timeoUT DuriNg Read queRy aT consisTenCy LoCAl_QUoRuM (2 
responsEs were reQuIrEd BuT onLy 1 repLIca respoNdEd)

A:

wiTh tHis veRSion of cassaNdra It ShOUld Be betteR ThAN BefoRe, AlThouGh sTiLl theRe coULd bE perforMance probLemS AccoUnTeD to acceSsing to many SStaBles, making SeLecTions oNLY on partiTion key, etc.
This presentatIOn gives GooD overView Of work donE to SupporT "wiDE partiTions", aLthouGh It's STIll reCOMmEndEd Way to re-modEL DatA.

 Q:

Why Is My XWEbView sErved index.html usinG The File scheme and How Do I cHANgE it?

i'M uSIng A WkwebvIEw to serve the indEx.html of a sInGLe Page web app (EMbeR) lIke this:
Class ViEwConTRoller: UiViewContRoller {
    oveRrIde fUNC viEwDidLoad() {
        sUper.view
 the error:

batchtest for k="true" t odir= "ta rge t/ test -rep orts"

The for k  par ameter was set to fals e inth e  bat c ht est.Setting it b ack  t o"tr ue "  p roduc esthe exp ected jaco co. ex ec.

 Q:

Wh a tis the sid e e ffect of hav ing  Cassa nd rat ables  wi th pa rtitio n  sizes  of moreth a n 100M B ?

I am r un ning  Apache Cassandra 3. 1 1.1 and have 6  table ss iz e s  in  th e failingst ate.M ax part i ti o n isl arger than 10 0MB.
For th e se6 tabl es  th e  parti tionsi z esare on aver agebetween 2 00MB a n d upwar d s of 5G B. 
Th ese  6tabl e sar e s pl i t a c ro ss3  ke y spaces  a nd  arespec i f i c  toAkk a Pe rsist ence eventsBy Tag  (i. e . e vents ByTag 1, e ve ntsBy Tag2). 
Much  o f the data in t hese  tables i s n ot  us ed  it s t ill ne eds  to  be ava ilable. 
I' ml o o ki ng at changing the  d a t amodel ho wevera tth e  same ti me  I' m tr y i ng to  bet t er  underst and wh a tth e impac tis ofha vin g l argep arti tion s izes. 
O thert han running ou t  of memory or hi t t in g  Cas san dra limitat ions what  are so meo f the  othe rn eg a tive impacts of hav in g larg e par tition sizesif most of t h e data i s no t  a c cessed? 
A spe cific  case that might be  rela ted (not  confirme d )  is that  I' m c urr ent l y  r unning Cassan d r a wi th  materi ali zed vie wsand  el ast ic search. A t timesth epr oj ect ionsu sed to u pd ate  e las ticse a rch wi th da ta f ro mC ass andra f a il a nd I 'm  n ot y etsu re if  thi s  is  relate d.
The er ror mess ag eI recei ve in this ca se  is:
Cause dby:  com.d a t astax.dr iver.core.exceptions.Re a dTimeou tEx cepti on:
Cassandr a t imeout  du r ing re ad que ry at  c ons i s tency L OC AL_ QU ORUM (2 
r e s pon ses w er e re quiredbut only 1 replica res ponded)

A:
Wit h th i s  v ers i on ofCa s san d r a it should bebetter tha nb ef ore, altho u ghst ill the re coul d bep erforma nce probl ems accou nt ed t o acc essing tomany SST ables, ma k ing s e le ction s o nly on  p art ition  key,e tc. 
This  prese nt ationgives  g ood over view of work done to su pport"wide  pa rtitions" , a l tho ugh it'sstil l recommen ded  wa y tore- m odeldata . 
 Q: 
Whyis m y  XWebView se rve d in dex.html us i n g  th e fil e s c heme a nd h ow do I change it ? 

I'm using aWKWe b V iew  to serv ethe index.html  of  a s ingle pa ge  web app (e mber) li ke this: 
class  ViewC ontroll e r :U IViewC ontr oll er {
   ove rr i de func  v ie w DidLoa d(){       supe r .vie w 
 the_error:

batchtest fork="true"_todir="target/test-reports"

The fork parameter was_set to_false_in the_batchtest._Setting it back_to "true" produces_the expected jacoco.exec.

 Q:

What_is the side_effect_of having Cassandra tables with partition sizes of more than 100MB?

I am running Apache_Cassandra_3.11.1 and_have_6_tables sizes in the failing_state.
Max partition is larger than_100MB.
For these_6 tables the partition sizes are on average_between_200MB and upwards_of 5GB. 
These 6 tables are split across 3_key spaces and are specific to_Akka Persistence eventsByTag_(i.e._eventsByTag1,_eventsByTag2).
Much of the data_in these tables is not used_it still needs to be available._
I'm looking at changing the data model_however at the same time I'm_trying to better understand what_the impact_is of having large partition_sizes. 
Other than_running out_of memory or_hitting Cassandra limitations what are some_of the other_negative impacts of having large partition_sizes_if most of_the_data_is not_accessed? 
A specific_case_that might_be_related (not confirmed) is that I'm_currently_running Cassandra with materialized views and elasticsearch._At times the projections_used_to update elasticsearch with_data from Cassandra fail and_I'm not yet sure if this_is related.
The_error message_I receive in this case is:
Caused by: com.datastax.driver.core.exceptions.ReadTimeoutException: 
Cassandra timeout during_read query at consistency LOCAL_QUORUM (2_
responses were required but_only 1_replica_responded)

A:

With this version_of_Cassandra it_should be better than before, although still_there could_be performance problems accounted to accessing_to many SSTables, making_selections_only on partition key, etc.
This presentation_gives good overview of work done_to support "wide partitions", although_it's_still_recommended way to re-model data.

_Q:

Why is my XWebView served index.html_using the file_scheme and how do I change it?

I'm_using_a WKWebView to serve the index.html_of_a single page web app (ember)_like_this:
class_ViewController: UIViewController {
  _ override func viewDidLoad() {
 _      super.view