Coupling Express Long Reach InfiniBand coupling links InfiniBand coupling links at an unrepeated distance of 10 km (6.2 miles) Virtual Flash Memory use by CFCC CFCC Coupling Thin Interrupts a. All statements regarding IBM plans, directions, and intent are subject to change or withdrawal  without notice. Any reliance on these statements of general direction is at the relying party’s  sole risk and will not create liability or obligation for IBM. VFM can be used in coupling facility images to provide extended capacity and availability for  workloads that use Websphere MQ Shared Queues structures. The use of VFM can help  availability by reducing latency from paging delays that can occur at the start of the workday  or during other transitional periods. It is also designed to help eliminate delays that can occur  when diagnostic data during failures are collected. The Coupling Thin Interrupts enhancement is delivered with CFCC 19. It improves the  performance of a CF partition and improves the dispatching of z/OS LPARs that are awaiting  the arrival of returned asynchronous CF requests when used in a shared engine environment.  7 HCA2-O is not supported on z14. Chapter 7. Operating system support  277 The CE LR link provides point-to-point coupling connectivity at distances of 10 km  (6.21 miles) unrepeated and defined as CHPID type CL5 in IOCP. The supported operating  systems are listed in Table 7-5 on page 251. HCA3-O$^{7}$ (12xIFB) fanout supports InfiniBand coupling links 12x at a maximum distance of  150 meters (492 feet) and defined as CHPID type CIB in IOCP. The supported operating  systems are listed in Table 7-5 on page 251. HCA3-O LR$^{7}$ (1xIFB) fanout supports InfiniBand coupling links 1x at an unrepeated distance  of 10 KM (6.2 miles). The supported operating systems are listed in Table 7-5 on page 251. Note:  IBM z14 is last z Systems and IBM Z server to support HCA3-O fanout for 12x IFB  (#0171) and HCA3-O LR fanout for 1x IFB (#0170).$^{a}$ As announced previously, z13s is the  last mid-range z Systems server to support these adapters.  Enterprises should begin migrating from HCA3-O and HCA3-O LR adapters to ICA SR or  Coupling Express Long Reach (CE LR) adapters on z14, z13, and z13s. For high-speed  short-range coupling connectivity, enterprises should migrate to the Integrated Coupling  Adapter (ICA-SR).  For long-range coupling connectivity, enterprises should migrate to the new Coupling  Express LR coupling adapter. For long-range coupling connectivity requiring a DWDM,  enterprises must determine their needed DWDM vendor’s plan to qualify the planned  replacement long-range coupling links. IBM Z enterprises should plan to migrate off of InfiniBand coupling links. For high-speed  short-range coupling connectivity, enterprises should migrate to the Integrated Coupling  Adapter (ICA-SR). For long-range coupling connectivity, enterprises should migrate to the new CE LR  coupling link. For long-range coupling connectivity that requires a DWDM, enterprises  must determine their wanted DWDM vendor’s plan to qualify the CE LR. Reference  Hardware Announcement 117-031, dated March 2017.